Age Difference

Stories in which there is a large age difference between partners—usually guys around 20 with guys around 40 or 50.

  Child of:  Choice of Partner. Related tags:  Age Difference;Bestiality;First Time/Virgin;Incest;Misogyny;Not Only Male;Seniors.

  Tag Group:  Age.

A 2

Alpha product series by Chet Boner 19-year-old Trent accepts a free trial product series called “Alpha Product” in exchange for his feedback. He receives the first product very quickly, but doesn’t know how many people would be affected and grow as a result of this choice! 19 parts Added May 2017 85k views 4.3 stars (43 votes) 23k words •Cock Growth•Huge Balls•Hyper Cum•Nipple Emissions•Muscle Growth•Muscle/Strength•Age Difference•Incest•Brothers•Father/Son•Stories with Images •M/M•M/M/M

The awakening by Johnny M Danny’s secret muscle-breast fantasy kink begins bleeding into the real world. 10 parts Added Jul 2012 62k views 4.7 stars (21 votes) 25k words •Hyper Cum•Nipple Emissions•Muscle Breast•Muscle/Strength•Age Difference•Incest•Brothers•Father/Son •M/M•M/M/M•M/M/M/...

B 3

Beyond Marrakech by brazboy What lies beyond Marrakech, gateway to the inhospitable Sahara? There lie lush green oases amidst the endless sand, made possible and populated by an unusual variety of men, their society, their rules and rulers. 6 parts Added Feb 2023 3,518 views 4.8 stars (8 votes) 10k words •Always Hard•Huge Balls•Huge Cock•Hyper Cock•Hyper Cum•Nipple Emissions•Public Orgasm•Muscle/Strength•Public Nudity•Increased Libido•Giants•Plausible Size Difference•Age Difference•First Time/Virgin•Incest•Brothers•Dom/Sub•Sex-Slave•Medieval(ish) •M/M•M/M/M/...

The boy god moves in by Richard Jasper This one is a continuation of LuvMusl’s classic story, Boy God. He kindly agreed to let me play with his characters. And, me being me, this one is very much in my style, not his. Added Aug 2020 6,488 views 4.5 stars (4 votes) 3,727 words •Huge Cock•Muscle Growth•Muscle/Strength•Age Difference

Bull’s strength by muscl4life On a quiet farm far from anywhere, an orphan named Joshua grows up so huge and strong that he’s bullied for being a freak. His aunt and uncle raise him with love and teach him to accept who he is, but Joshua yearns to be among men who don’t just accept his giant body, but love and admire his amazing size and power. 28 parts Added Jul 2018 86k views 4.8 stars (43 votes) 88k words (#28) •Always Hard•Cock Growth•Huge Balls•Huge Cock•Hyper Cock•Multi-abs•Multicock•Muscle Growth•Muscle/Strength•Muscle Worship•Transformation•Getting Taller•Plausible Size Difference•Size Increase•Age Difference•Bestiality•Incest•Father/Son•Destruction/Violence•Infectious•Flying •M/M•M/M/M•M/M/M/...

C 5

Chris olympus by FanTCMan 3 parts Added Dec 2002 39k views 4.5 stars (21 votes) 9,167 words •Cock Growth•Straight to Gay•Muscle Growth•Muscle/Strength•Getting Hairy•Age Difference•Incest•Father/Son

The chronicles of Besar Otot by OneLuckyGuy89 On a distant unknown island near Indonesia called Besar Otot, Kenny Masters returns home a new man and intends to change his family as well. 8 parts Added Jan 2020 20k views 4.0 stars (3 votes) 26k words •Cock Growth•Huge Balls•Huge Cock•Hyper Cock•Hyper Cum•Multicock•Gender Swap•Straight to Gay•Muscle Growth•Muscle/Strength•Transformation•Getting Taller•Plausible Size Difference•Size Increase•Age Progression•Getting Hairy•Age Difference•Incest•Brothers•Father/Son•Nonconsensual change•Hyper Pheromones

Company guys by FanTCMan You can’t even imagine how excited Joey and I were, excited and scared, when Dad said he was going to give us the formula he’d been sampling. We were going to be models for what he called the Company. 2 parts Added Dec 2002 35k views 4.6 stars (11 votes) 7,919 words •Cock Growth•Huge Cock•Other Mental Changes•Straight to Gay•Muscle Growth•Muscle/Strength•Increased Libido•Getting Hairy•Age Difference•Incest•Father/Son

The construction worker by Peterbilt A troubled young hardhat named Jordan is helped through a series of self-discoveries by Joe, a father-figure who comes to mean more and more to Jordan. Added Sep 2015 26k views 4.9 stars (14 votes) 22k words •Cock Growth•Huge Cock•Muscle/Strength•Age Difference•First Time/Virgin•Incest•Father/Son

The cowboy by Chance Riverwind Added Jul 2002 19k views 2.1 stars (7 votes) 1,967 words •Cock Growth•Huge Cock•Muscle/Strength•Giants•Age Difference•Incest•Father/Son

D 12

Daddy muscle by Richard Jasper When Roger’s daughter is born, he decides it’s time to grow some serious muscle. He succeeds beyond his wildest dreams. It’s the Circle of Life! Added Apr 2020 9,404 views 4.5 stars (8 votes) 7,446 words •Muscle Growth•Muscle/Strength•Age Difference

Daddy’s little boy by TonnyGiant Jimmie returns home from college for the summer to rediscover just how drawn he is to his massive, muscle bear stepfather. 2 parts Added Sep 2018 31k views 4.7 stars (11 votes) 4,961 words •Huge Cock•Muscle Gut•Muscle/Strength•Plausible Size Difference•Age Difference•Incest•Father/Son•Dom/Sub •M/M

Dad’s gift by John Y. For Jeff’s 18th birthday, his dad decides to give him something special and close to his heart—a donkey dick. Added Mar 2004 50k views 4.7 stars (27 votes) 4,994 words •Cock Growth•Huge Cock•Age Difference•Incest•Father/Son

Daemos island by Charles Westfall A Polish scientist and explorer, Ferdinand Rolcek, discovers a hidden island where the lost secrets of the Daemos, alien pioneers of masculine beauty and sexuality far beyond anything known to humanity, are finally revealed to him; and what he learns makes him never want to leave again. Don’t worry, he won’t be lonely. 6 parts Added Feb 2003 30k views 3.2 stars (20 votes) 15k words •Cock Growth•Huge Cock•Muscle Growth•Muscle/Strength•Increased Libido•Size Increase•Age Difference•Incest•Father/Son•Twins•Destruction/Violence •M/t

Damian and the three muscleteens by hyperboi 5 parts Added Dec 2012 57k views 4.3 stars (27 votes) 8,170 words •Cock Growth•Huge Cock•Hyper Cock•Straight to Gay•Muscle Growth•Muscle/Strength•Age Difference•Incest•Brothers•Father/Son•Twins•Infectious

Davey and the Donaldsons by BRK Davey, a high-spirited young twunk, decides to cheer up a forty-something couple he meets at a happening bar the night of his 25th birthday. Added Feb 2023 3,730 views 4.6 stars (10 votes) 2,471 words •Cock Growth•Muscle Growth•Getting Handsomer•Suggestion•Age Difference •M/M/M

A day at the beach by Thatbadwriter You watch in dismay and amazement as your father, who’s gained the ability to grow himself to giant size in a freak medical accident, takes a trip to the beach with you and decides to make himself bigger than he’s ever tried to become before. Added Aug 2019 13k views 4.1 stars (16 votes) 1,624 words •Huge Cock•Hyper Cock•Giants•Size Increase•Age Difference•Incest•Father/Son•Destruction/Violence

Days & Knights by iHeywood Bash wants to surprise his family by coming home from college for Thanksgiving early. But he gets a surprise himself. His dad is sucking his own massive cock. 3 parts Added Apr 2022 9,718 views 4.8 stars (33 votes) 9,852 words •Cock Growth•Huge Cock•Hyper Cock•Self-suck•Hyper Cum•Muscle Growth•Age Difference•Incest•Father/Son•Thanksgiving •M/M•M/M/M

Derek’s rebirth by muscl4life An elixir from the dawn of time is turning Derek into the ultimate muscle daddy, which he demonstrates by wearing out three young admirers. Taking on a personal trainer as his acolyte, Derek prepares himself for an even more impressive Phase Two of his transformation. 3 parts Added Nov 2018 32k views 4.6 stars (19 votes) 12k words •Cock Growth•Huge Balls•Huge Cock•Hyper Cock•Self-suck•Hyper Cum•Nipple Emissions•Straight to Gay•Muscle Growth•Muscle/Strength•Giants•Plausible Size Difference•Size Increase•Age Difference •M/M

Domination is the core of sex by Master Primus A young college boy learns to seduce and dominate men and jocks in his life. His life will take many turns in terms of love, tragedy, and more. Read to find it out. Added Jun 2020 4,897 views 5,094 words •Muscle/Strength•Age Difference•Dom/Sub•Humiliation•Sex-Slave

A donkey dick at the senior rehab by Flynn It’s all right there in the title. Added Jun 2014 18k views 3.8 stars (10 votes) 1,606 words •Huge Cock•Age Difference•Seniors

Down on his luck by BigManBigBelly Brody was dumped by his girlfriend, who took the dog, and then was fired at his job. Depression leads to weight gain but he manages to catch the eye of a wealthy, older man who forces him to confront new thoughts and considerations. Added Feb 2022 4,283 views 5.0 stars (3 votes) 4,588 words •Straight to Gay•Getting Fatter•Age Difference •M/M

E 3

Empire by LenZelig A massive consolidation of the entire “Bill’s Education” universe, incorporating the previously separately posted “The Surfer”, “The Rescue”, “Spring Break”, “Pickup Trouble”, and “School Days”, “Empire” is the wide-ranging tale of easy transformation and even easier sex across all boundaries—friends, family members, genders, even species—as a fortunate crop of humans stumble into a wider universe of size, muscle, double-digit-length cocks and much, much more and discover the true meaning of shared, radical, uninhibited pleasure. 40 parts Added Apr 2019 133k views 3.7 stars (6 votes) 366k words (#1) •Cock Growth•Huge Cock•Self-suck•Straight to Gay•Muscle Growth•Muscle/Strength•Getting Taller•Size Increase•Age Difference•Bestiality•First Time/Virgin•Incest•Brothers•Father/Son•Twins•Bisexual•Hetero Sex•Nonconsensual change•Sex-Slave•Shared Body•Aliens•Space Travel•Witch/Warlock/Wizard•Thanksgiving•Mind Control•Complete

Endmyths by Taur Reg Transformations spread through an entire town—but why? 12 parts Added Aug 2013 18k views 4.8 stars (6 votes) 19k words •Multilimb•Age Difference•Incest•Father/Son•Centaurs•Naga•Satyrs•Shapeshifting

The expedition by BRK An archaeologist and his research assistant, joined at the last minute by a jock desperate to boost his GPA, embark on a preliminary exploration of a mysterious Aegean island. 16 parts Added Jul 2021 18k views 4.9 stars (16 votes) 37k words •Always Hard•Cock Growth•Huge Cock•Multicock•Multihead•Boytaur•Four Legs•Lots of Legs•Multiarm•Multileg•Multilimb•Three Legs•Multitongue•Replication•Stacking•Hyper Strength•Muscle Growth•Muscle/Strength•Always Shirtless•Increased Libido•Getting Taller•Giants•Plausible Size Difference•Size Decrease•Size Increase•Tongue Growth•Age Difference•Selfcest•Infectious•Merging•Shared Body•Centaurs•Pagan gods •M/M•M/M/M

F 3

First big date by Peterbilt Ben’s story of his relationship with young Jason covers many years, including getting the deets of Jason’s first big date. 3 parts Added Dec 2007 32k views 4.9 stars (22 votes) 37k words •Cock Growth•Huge Cock•Public Orgasm•Muscle/Strength•Age Difference•First Time/Virgin •M/M

The formula by hyperboi Mike begs his genius friend Jeff to try coming up with a cock growth formula. Jeff assumes Mike doesn’t want to look too small when he goes out for the swim team, but the secret truth is, Mike’s ambitions aren’t limited to his own junk. 4 parts Added Jan 2021 26k views 4.9 stars (30 votes) 15k words •Cock Growth•Huge Cock•Hyper Cock•Self-suck•Muscle Growth•Muscle/Strength•Age Difference•Incest•Brothers•Father/Son•Twins •t/t•t/t/t...

Frank revisited by Richard Jasper An update to a classic anonymous story. 16-year-old Frank Wynn is stick thin until a mishap in the backyard shed douses him in every chemical known to gardening and lawn care. His resulting spectacular growth is everything he could have dreamed of! Added Oct 2020 7,772 views 4.8 stars (4 votes) 4,445 words •Cock Growth•Huge Cock•Muscle Growth•Muscle/Strength•Gradual Change•Age Difference

G 1

Grow for me by Richard Jasper In this shorty (1000 words), the middle-aged musclebear protagonist takes in a lanky 18-year-old who’s been kicked out of house and home by his homophobic asshole dad. The musclebear’s only request? GROW! And boy does he! Added May 2020 6,147 views 4.6 stars (7 votes) 1,135 words •Muscle Growth•Muscle/Strength•Age Difference

H 2

Hic sunt dracones by Tym Greene A college student finds out that his former professor (and current boyfriend) has a bit of a secret. Turns out the student has a secret too, one that will likely spell change for the whole campus. 2 parts Added Jan 2021 7,111 views 4.9 stars (7 votes) 15k words •Cock Growth•Huge Cock•Muscle Growth•Muscle/Strength•Transformation•Size Increase•Human to Animal/Anthro•Age Difference•Anthro/Scaly•Dragons

His last hypnosis show by EdIam Paul has decided to put his long career as a hypnotist to bed… along with many of the new local men he’s meeting. 3 parts Added Mar 2022 3,866 views 4.3 stars (4 votes) 11k words •Straight to Gay•Public Nudity•Suggestion•Age Difference•Incest•Father/Son•Sex-Slave•Hypnosis•Mind Control •M/M

I 2

I think... by EdIam Larry wants to think for Zack. 12 parts Added Apr 2021 19k views 4.2 stars (11 votes) 151k words (#6) •Other Mental Changes•Straight to Gay•Muscle/Strength•Age Difference•Incest•Brothers•Twins•Dom/Sub•Humiliation•Hypnosis•Mind Control •M/M•M/M/M

Induced transformation: a brief history by BRK A father explains to his son that back in his day, they didn’t have any of these fancy-schmancy apps with built-in retcon. Back then, if you changed someone, they changed, and everyone had to just suck it up and deal with it. Added Jun 2020 12k views 4.9 stars (17 votes) 2,248 words •Cock Growth•Huge Cock•Hyper Cock•Hyper Cum•Replication•Muscle Growth•Age Regression•App•Retcon•Age Difference•Incest•Brothers•Father/Son•Selfcest•Nonconsensual change•Infectious•All Dialog•Complete •M/M•M/M/M/...

J 1

Jallen by Richard Jasper Orphaned from birth, Jallen’s amazing growth has continually confounded and upset the long procession of foster parents he has endured. Until he meets Officer Brian Molloy of the Houston P.D. 10 parts Added May 2020 6,418 views 4.4 stars (8 votes) 15k words •Huge Cock•Muscle Growth•Muscle/Strength•Getting Taller•Age Difference

K 2

Kept boy by Richard Jasper Philanthropist Jason is wealthy, handsome, and built like a brick outhouse. Eddy is a handsome lad newly arrived from East Buddha. They meet at the Y and the rest is muscle growth history! 5 parts Added May 2020 4,150 views 5.0 stars (1 vote) 6,266 words •Huge Cock•Pec Fucking•Muscle Growth•Muscle/Strength•Gradual Change•Age Difference

The kid by Richard Jasper Derek Harcourt is 50-something hardcore walking wet dream of a musclebear. Frank is his 20-something straight boy lifting buddy. And Blake is a totally adorable 5’6 pup who is pleased as punch to be benching 205 lbs.—about what Derek can curl. The growth never ends! 3 parts Added Dec 2020 4,431 views 4.0 stars (1 vote) 3,514 words •Huge Cock•Muscle Growth•Muscle/Strength•Age Difference

L 4

The lawnmower boy by Anonymous Added Jul 2006 24k views 4.8 stars (8 votes) 6,172 words •Cock Growth•Huge Cock•Muscle Growth•Muscle/Strength•Age Difference

Lockdown gym by BRK When Ed clears out his garage, his neighbor’s hunky college-age sons suggest converting the space to a lockdown gym for guys like them who want to maintain and can’t work out anywhere else. Despite the risk of distraction, Ed agrees, though the effect on his daily life turns out to be even greater than he expected. Added Apr 2021 13k views 4.7 stars (21 votes) 3,110 words •Always Hard•Cock Growth•Huge Cock•Replication•Straight to Gay•Muscle Growth•Muscle/Strength•Muscle Worship•Always Shirtless•Getting Handsomer•Gradual Change•Getting Taller•Age Difference•Incest•Brothers•Twins•Selfcest•Complete•Set during the Pandemic •M/M•M/M/M/...

Love/shift by BRK Maxfield has very mixed feelings about leaving the city and all his tech behind to spend the summer after graduation halfway up a mountain in the family’s backwoods cabin—just him, his dad, and a whole lot of secrets. 11 parts Added Dec 2017 43k views 4.8 stars (36 votes) 68k words (#42) •Muscle Growth•Muscle/Strength•Always Shirtless•Man Scent•Gradual Change•Transformation•Size Increase•Getting Hairy•Age Difference•Incest•Father/Son•Werebears•Supernatural•Complete •M/M

Lust & consequences by BRK Hayden manages to gain an ability that turns beliefs into truth, but the knack for making things turn out the way he wants them to is a lot more elusive. 2 parts Added Feb 2022 7,948 views 4.8 stars (15 votes) 6,212 words •Cock Growth•Huge Balls•Huge Cock•Wings•Hyper Strength•Getting Handsomer•Retcon•Suggestion•Age Difference•Incest•Father/Son•Flying•Complete•Medieval(ish) •M/M

M 12

Mass X by Max Mann Five short stories of men getting bigger and sexier, through the use of “Mass X”. 5 parts Added Feb 2005 46k views 4.7 stars (16 votes) 19k words •Cock Growth•Huge Cock•Straight to Gay•Muscle Growth•Muscle/Strength•Increased Libido•Getting Handsomer•Getting Hairy•Age Difference•Incest•Father/Son•Christmas•New Year’s Eve •M/M

Massive by Alex Rif James finds the superhero costume his stepson had ordered from a strange website for Halloween, and decides to try it on. 2 parts Added Feb 2016 37k views 3.7 stars (17 votes) 2,851 words •Size Increase•Body Suit•Age Difference•Incest•Father/Son•Lycra/Spandex•Halloween•Superhero/Supervillain•Stories with Images •M/M

Me and Mr. K by Richard Jasper Roger Jolson, the world’s strongest teen, is excited about meeting Ben Kazakian, the World’s Strongest Man, a friend of Roger’s hunky coach, Stan Telatopolous. Their meeting does not go as any of them expected. Added Jun 2020 3,891 views 4.0 stars (2 votes) 3,305 words •Muscle Growth•Muscle/Strength•Age Difference

Meta massage therapy by M.M.69 A mysterious new massage parlor opened in town, and brothers Jared and Jason have VIP passes. What makes this place so special? 3 parts Added Nov 2021 12k views 5.0 stars (15 votes) 15k words •Always Hard•Cock Growth•Huge Balls•Huge Cock•Hyper Cock•Multicock•Multihead•Boytaur•Four Legs•Multiarm•Multileg•Multilimb•Multipec•Multitorso•Replication•Straight to Gay•Hyper Muscle•Hyper Strength•Muscle Growth•Butt Growth•Getting Handsomer•Getting Taller•Plausible Size Difference•Size Increase•Retcon•Suggestion•Age Difference•Incest•Brothers•Father/Son•Selfcest•Dom/Sub•Pagan gods •M/M

Mister by Richard Jasper Musclegod Frank doesn’t know quite what to think of the hunky Latin kid who seems to trip over his own feet whenever Frank shows up. For his part, Eduardo is trying not to cream his pants whenever he looks in Frank’s direction. Eventually, they figure it out! Added Jun 2020 3,248 views 4.0 stars (1 vote) 1,855 words •Huge Cock•Muscle/Strength•Age Difference•Dom/Sub

Mountainheart by BRK It’s 1999, and Glenn, until now kept from his heritage, uncovers what it means to be a Sheridan. Fortunately, he has his closest friend, Eamon, at his side. 12 parts Added Nov 2021 20k views 5.0 stars (25 votes) 60k words (#46) •Cock Growth•Huge Balls•Huge Cock•Muscle Growth•Muscle/Strength•Always Shirtless•Increased Libido•Gradual Change•Getting Taller•Plausible Size Difference•Size Increase•Age Regression•Getting Hairy•Age Difference•First Time/Virgin•Incest•Brothers•Father/Son•Werebears•Supernatural•Shapeshifting •M/M

Musclove, Texas by Max Mann Moving to Musclove, Texas with his sons to take up a new teaching position, Rick Long is startled to find a town full of huge, hung, and horny men, all of them eager to have the newcomers join them (in more ways than one). 9 parts Added Sep 2004 71k views 4.8 stars (50 votes) 26k words •Cock Growth•Hyper Cock•Hyper Cum•Muscle Growth•Muscle/Strength•Age Difference•First Time/Virgin•Incest•Brothers•Father/Son•Twins•Restraints

My boy by Richard Jasper Matt is a major muscle bear, looking for someone who deserves his undivided attention. One night at the Ripcord he runs into Kel and the rest, as they say, is history! 4 parts Added Nov 2020 4,014 views 4.0 stars (1 vote) 3,143 words •Muscle Growth•Muscle/Strength•Age Difference

My roommate (complete) by LenZelig Bill’s hot adventures with his irresistible sex-god of a roommate, Andy Wang, and the others drawn into his adventures, combined with the stories of Andy’s son and his friends. (This revised and updated compilation version includes both “My Roommate” and “My Roommate: The Next Generation.”) 29 parts Added Jul 2002 155k views 4.5 stars (25 votes) 223k words (#3) •Cock Growth•Huge Cock•Muscle Growth•Muscle/Strength•Age Difference•First Time/Virgin•Incest•Brothers•Father/Son•Bisexual•Hetero Sex•Dom/Sub•Witch/Warlock/Wizard•Gay Pride•Mind Control•Complete •M/M•M/M/M•M/M/M/...•t/t•M/t•M/F•M/M/F

My son home on leave by Peterbilt A story of sex between a man and his adult Marine son when he is home on leave. 2 parts Added Feb 2017 17k views 4.7 stars (11 votes) 18k words •Huge Cock•Muscle/Strength•Age Difference•Incest•Father/Son

My son is worried about his big cock by UnknownGentrifier Andy seeks his father’s advice about whether his cock really is too big, like his friends say it is. Added Oct 2020 9,643 views 3.5 stars (12 votes) 2,194 words •Huge Cock•Age Difference•Incest•Father/Son

My son, the superstud by Max Mann Thom is shocked to hear that his son Rusty has enrolled in a muscle-growth transformation experiment—and it’s already too late to stop him. Added Oct 2003 114k views 3.9 stars (33 votes) 3,842 words •Cock Growth•Huge Cock•Straight to Gay•Muscle Growth•Muscle/Strength•Age Difference•Incest•Father/Son •M

N 4

New neighbors by BRK Jimmy is starting to enjoy his first summer with his newly acquired wishpower when a very sexy couple moves in next door. The only trouble is, Jimmy doesn’t immediately recognize the true nature of their relationship, and by the time he does, it’s already too late. 2 parts Added Jan 2016 19k views 4.5 stars (12 votes) 11k words •Huge Cock•Multicock•Age Difference•Incest•Father/Son

The night shift by Dreamtransformer Added Dec 2013 13k views 2.0 stars (2 votes) 1,239 words •Muscle/Strength•Age Difference•Incest•Father/Son

Not just imagination by DarkDjin Jampson’s overactive imagination starts to grow his cop dad and his friends...and somehow not only does it become real, but the men are pretty into it. 2 parts Added Jun 2014 40k views 4.6 stars (38 votes) 11k words •Cock Growth•Huge Cock•Muscle Growth•Muscle/Strength•Suggestion•Age Difference•Incest•Father/Son

The Nubian prince by Richard Jasper 25-year-old Rob is 5’10” and 160 pounds of Drop Dead Gorgeous. They don’t call him “The Nubian Prince” for nothing! So why’s he hiring a personal trainer at Solstice, the hottest gay gym in town? Because he’s bored. His only requirement: He doesn’t want to get any bigger! 5 parts Added Sep 2020 4,086 views 5.0 stars (3 votes) 4,245 words •Huge Cock•Muscle Growth•Muscle/Strength•Gradual Change•Age Difference

P 3

Polypropylene muscle daddy by TitMorpher The wrestling team coach has the biggest muscle tits any of the guys had ever seen. But were they all muscle? Were they even real? Added May 2020 10k views 5.0 stars (3 votes) 2,602 words •Muscle Breast•Muscle/Strength•Age Difference•Stories with Images

Pool party by FanTCMan Two young men are nervous but excited. They’re about to show off their muscle transformation in front of all the guys at the pool! Added Dec 2002 21k views 4.7 stars (9 votes) 1,575 words •Muscle Growth•Muscle/Strength•Getting Handsomer•Age Difference•Incest•Father/Son •M/M/M/...•t/t•M/t

Practical FX by MuscleMonkeh A special effects movie mogul, used to getting his own way, tries to muscle an especially gifted young producer into working for his production company. Added Jun 2018 14k views 4.9 stars (11 votes) 5,070 words •Cock Growth•Muscle Growth•Muscle Gut•Transformation•Size Increase•Human to Animal/Anthro•Age Difference•Nonconsensual change•Anthro/Furry•Fantasy Realm•Mind Control •M/M

R 2

Reality Pack by Thorn What happens when the program you’re working on for school has a downloadable mod? You investigate it of course! 15 parts Added Nov 2020 51k views 4.9 stars (38 votes) 79k words (#34) •Cock Growth•Huge Cock•Pec Fucking•Muscle Breast•Muscle Growth•Muscle/Strength•Butt Growth•Belly Growth•Gradual Change•Getting Taller•Plausible Size Difference•Getting Hairy•App•Age Difference•First Time/Virgin•Incest•Brothers•Father/Son•Valentine’s Day •M/M•M/M/M

The runner by LenZelig Jake is out for a morning run when he meets up with someone who is more than a man and looking for a different kind of exercise. Added Jun 2020 9,044 views 4.8 stars (4 votes) 8,270 words •Huge Cock•Straight to Gay•Muscle/Strength•Suggestion•Age Difference•Incest•Brothers•Father/Son•Bisexual•Hetero Sex•Dom/Sub

S 10

Sam and Bolt by MaxMorphs Sam’s father, Bolt, shares with his size-hungry son the secrets of becoming truly huge. 11 parts Added Sep 2016 79k views 3.9 stars (56 votes) 48k words (#70) •Cock Growth•Huge Balls•Huge Cock•Hyper Cock•Nipcocks•Self-suck•Cum inflation•Hyper Cum•Nipple Emissions•Getting Taller•Size Increase•Getting Hairy•Age Difference•Incest•Father/Son•Infectious •M•M/M•M/M/M/...

Santa’s big surprise: Family visit by Silverfox Dad Muscle studs Jeremy and Marco are incredibly happy together thanks to Santa’s gift the year before, and with their stunning physiques they have money and fans and everything they could need. Now, if only their families weren’t coming for Christmas… 2 parts Added Dec 2018 9,591 views 5.0 stars (5 votes) 6,719 words •Cock Growth•Huge Cock•Muscle Growth•Muscle/Strength•Age Difference•Seniors•Christmas •M/M

Sensational summer growth by OneLuckyGuy89 Todd and Aaron return home to their hometown of Portland as changed men. Now it’s time for them to change the rest of the town. 3 parts Added Apr 2022 14k views 5.0 stars (3 votes) 8,409 words •Cock Growth•Multicock•Straight to Gay•Muscle Growth•Man Scent•Butt Growth•Getting Handsomer•Voice Deepening•Getting Taller•Getting Hairy•Age Difference•Incest•Brothers•Father/Son •M/M•M/M/M

The Servonyx exclusion by BRK Uncovering some corporate skulduggery leads to dire consequences for Beck. Nearly killed in a suspicious crash, he soon finds himself halfway around the world trapped in a physically enhanced pleasure humaniform… in the keeping of a handsome Russian plutocrat. Pleasure is easy to unlock in this new existence, but escape and revenge will be a lot harder to manage. 3 parts Added Jul 2018 10k views 5.0 stars (10 votes) 14k words •Cock Growth•Multiarm•Multilimb•Muscle Growth•Size Increase•Age Difference•Nonconsensual change•Androids/Cyborgs •M/M

Shirtbusters by TFWizard Jared, Lance, and Lance’s father Ben discover a way to bust out of their shirts, and they can’t get enough of it. 2 parts Added Oct 2005 47k views 4.1 stars (15 votes) 6,769 words •Muscle Growth•Muscle/Strength•Size Increase•Age Difference•Incest•Father/Son

The simulated universe by Thorn A group of men play a new board game that can simulate a “universe” where they play as trailblazers and are granted boons, which could lead to a few…enhancements. 6 parts Added Jul 2023 9,832 views 4.9 stars (24 votes) 26k words •Cock Growth•Huge Balls•Ball Growth•Huge Cock•Muscle Breast•Muscle Growth•Voluptuous Men•Butt Growth•Belly Growth•Increased Libido•Foot Growth•Gradual Change•Transformation•Getting Taller•Plausible Size Difference•Size Increase•Getting Hairy•Inflation•Age Difference•Father/Son •M/M/M

Sinfulfillment by EdIam Chester is an old pervert obsessed with his coworker’s husband, Jason. Unluckily for the intensely jealous Chester, Jason is madly and irrevocably in love with the coworker, Bryan. Luckily for Chester, there’s a mysterious entity willing to give him everything he wants…if he satisfies their mysterious needs. Added Sep 2023 561 views 4.7 stars (3 votes) 5,040 words •Other Mental Changes•Retcon•Age Difference•Humiliation•Nonconsensual change•Sex-Slave •M•M/M

Spice by Mr. X and Mad Dog In this epic story, the transformative powers of a certain substance are tested by a couple of very horny guys. 50 parts Added Oct 2009 226k views 4.4 stars (60 votes) 221k words (#4) •Cock Growth•Huge Cock•Other Mental Changes•Hyper Muscle•Hyper Strength•Muscle Growth•Muscle Theft•Muscle/Strength•Muscle Worship•Man Scent•Foot Growth•Gradual Change•Transformation•Voice Deepening•Getting Taller•Size Increase•Getting Hairy•Age Difference•Incest•Father/Son•Supernatural•Gay Pride•Alcohol •M/M•M/M/M

Starting over: A coming of age story by Mad Dog and Gurak An older, oversized but closeted man finds new meaning to his life through the admiration of a younger fella. 3 parts Added Aug 2021 8,384 views 4.9 stars (7 votes) 23k words •Muscle Gut•Muscle/Strength•Plausible Size Difference•Age Difference•Seniors •M/M

Suggestions by Jack the Mindbender Jack is surprised by how quickly his hot stepfather goes from a closed book to jerking off right in front of him… Added Dec 2018 11k views 4.4 stars (10 votes) 2,749 words •Huge Cock•Suggestion•Age Difference•Incest•Father/Son•Mind Control •M/M

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Tag, you’re it! by Dream Big Traveling for a conference, Josh meets a distractly handsome and very well-built man with a few secrets hidden in his past. 6 parts Added May 2023 5,225 views 4.9 stars (9 votes) 11k words •Huge Cock•Muscle/Strength•Transformation•Age Difference •M/M

Tilling the soil by screamingmoist If you steal someone’s underwear in an attempt to copy their body, make sure you have the right locker first. Added Jun 2023 3,912 views 5.0 stars (3 votes) 7,160 words •Straight to Gay•Muscle Growth•Age Progression•Getting Hairy•Retcon•Age Difference •M/M

The touch by TylerGermany Nick is dosed with nanobots that allow him to grow and shrink others with just a touch. 2 parts Added Mar 2014 25k views 5.0 stars (3 votes) 11k words •Cock Growth•Huge Cock•Muscle Growth•Muscle/Strength•Nanotech•Age Difference •M/M

Toy story by LenZelig During a storm Bob stumbles across a strange webpage offering something called “The Ultimate Sex Machine”. Intrigued, he clicks “order”, expecting maybe a sophisticated sex toy. Instead he gets Randy, a hunk-shaped machine dedicated to ensuring that Bob experiences ultimate sexual possibilities from now on and willing to reshape reality to make it happen. 2 parts Added Jul 2002 30k views 5.0 stars (27 votes) 6,947 words •Muscle Growth•Muscle/Strength•Age Difference•Incest•Father/Son•Twins•Androids/Cyborgs•Space Travel•Complete •M/M•M/M/M/...•t/t•M/t

Twenty-five by Derek Williams Austin is a cocky young escort. When he meets up with an older client, he finds himself losing his youth and transforming into a sexually charged musclebeast. Added Jan 2022 6,934 views 4.8 stars (12 votes) 3,571 words •Muscle Growth•Increased Libido•Age Progression•Getting Hairy•Age Difference•Nonconsensual change•Metabods 25 •M/M

Twin studs by Anonymous 3 parts Added Jul 2014 18k views 4.0 stars (22 votes) 43k words (#85) •Huge Cock•Multicock•Multiarm•Multilimb•Age Difference•First Time/Virgin•Incest•Brothers•Father/Son•Twins

U 2

Ultimate muscle by Ultra-Muscle Philip gets injected with what he wants most—something that will make him a big muscle man like his dad. Added Dec 2013 29k views 3.6 stars (7 votes) 1,418 words •Huge Cock•Muscle Growth•Muscle/Strength•Age Difference•Incest•Father/Son

Uncle C by Portowulf Charles finds a trinket at a small store in the city that brings unexpected changes. Added Jun 2020 8,197 views 5.0 stars (3 votes) 3,028 words •Cock Growth•Straight to Gay•Muscle Growth•Increased Libido•Size Increase•Age Progression•Age Regression•Age Difference•First Time/Virgin•Incest •M/M

V 3

Vacation by muscle.growth Just a simple vacation sleepover with Matt, Alan, and Alan’s dad working on something weird in his basement lab. Added Feb 2009 21k views 4.7 stars (9 votes) 1,860 words •Cock Growth•Huge Cock•Muscle Growth•Muscle/Strength•Age Difference•Father/Son

Vision space by BRK Sent to explore an unknown, derelict spaceship in search of usable technology, a young marine unexpectedly discovers three sexy inhabitants, guardians of a secret no one could have imagined. Added Jun 2021 8,463 views 5.0 stars (11 votes) 6,302 words •Cock Growth•Huge Cock•Hyper Cock•Hyper Muscle•Muscle Growth•Muscle/Strength•Transformation•Getting Taller•Giants•Size Decrease•Size Increase•Age Difference•Aliens•Space Travel•Complete•Set in the Future •M/M

Visiting home by Wicked Asher spent his entire first semester working out and gaining some serious muscle, but when he returns home for winter break, he doesn’t realize that he’ll be the one amazed by how much someone can change. 2 parts Added Jan 2016 41k views 4.8 stars (28 votes) 6,753 words •Huge Cock•Muscle Growth•Muscle/Strength•Size Increase•Age Difference•Incest•Father/Son•Infectious •M/M

W 5

Welcum to Hell by Alex Anders The forces of Hell welcome their newest recruit. 9 parts Added Oct 2022 9,218 views 4.9 stars (7 votes) 17k words •Huge Cock•Hyper Cock•Prehensile Cock•Self-suck•Extra facial features•Multiarm•Multileg•Multilimb•Three Legs•Muscle Growth•Stretchy•Plausible Size Difference•Tongue Growth•Mouthcock•Age Difference•Merging•Goo People•Demons •M/M

Werequeer by Pfieffer A dad helps his son through his first transformation into a WereQueer. Added Apr 2004 31k views 4.9 stars (18 votes) 2,426 words •Cock Growth•Huge Balls•Hyper Cock•Hyper Cum•Transformation•Age Difference•Incest•Father/Son

What’s it like by Richard Jasper “What’s it like” to be the world’s biggest, strongest, most muscular 17-year-old? To make hairy, bearded powerlifting muscle daddies look like little boys? To be the object of worship of all of your classmates? To have, well, you’ll have to read the rest to find out, won’t you? Added Jan 2021 11k views 4.7 stars (3 votes) 1,441 words •Cock Growth•Huge Cock•Hyper Muscle•Hyper Strength•Muscle Growth•Muscle/Strength•Getting Taller•Size Increase•Getting Hairy•Age Difference

The witch’s menagerie by NioSatyr Deep in the forest, as far away from civilization as possible, lives an old but youthful witch. A witch who needs some help from young mortals in gathering her special ingredients. The job description includes some… adaptations, but her latest recruit doesn’t seem to mind at all. Added Sep 2021 5,332 views 4.0 stars (3 votes) 6,734 words •Cock Growth•Huge Balls•Self-suck•Hyper Cum•Public Orgasm•Wings•Public Nudity•Increased Libido•Transformation•Size Decrease•Human to Animal/Anthro•Getting Hairy•Age Difference•Bisexual•Hetero Sex•Witch/Warlock/Wizard•Flying

Wow by Richard Jasper It’s 1993 and 23-year-old Roger is very much looking forward to welcoming to Atlanta his friend from a usenet weightlifting group, a hunky 35-year-old gay muscle-bear named Jim. To say they’re impressed with each other is an understatement! 5 parts Added Nov 2020 3,184 views 3,258 words •Muscle Growth•Muscle/Strength•Age Difference

Y 1

You’re stuck with me, and I’m stuck with you by Salem Noctua All Erwin wants is to keep on sleeping. Unfortunately, he soon realises he is no longer in his room, and an older man who should not have been there is lying next to him! Where is he? Who is this man? And why can't he get away?! Added Jul 2023 1,248 views 5.0 stars (11 votes) 18k words •Multicock•Multihead•Plausible Size Difference•Age Difference•Merging•Complete •M/M

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The Zeke chronicles by Sean Reid Scott Zeke, an 18 year-old gorgeous stud, was already big before some very special visitors seem to have given him a special ability to grow and grow, bigger and bigger, stronger and stronger. 7 parts Added Jul 2013 48k views 4.4 stars (18 votes) 28k words •Cock Growth•Huge Cock•Muscle Growth•Muscle/Strength•Muscle Worship•Getting Taller•Age Difference•Incest•Father/Son•Dom/Sub •M/M•M/M/M