Age Difference

• 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!  •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  Added May 2017 Updated May 2019 19 parts 23,227 words 79,997 views 4.4 stars (42 votes)
• The awakening by Johnny M  [  ]  Danny’s secret muscle-breast fantasy kink begins bleeding into the real world.  •Hyper Cum •Nipple Emissions •Muscle Breast •Muscle/Strength •Age Difference •Incest •Brothers •Father/Son •M/M •M/M/M •M/M/M/...  Added Jul 2012 10 parts 24,690 words 59,613 views 4.7 stars (19 votes)

• 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.  •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/...  Added Feb 2023 6 parts 10,358 words 2,133 views 4.8 stars (10 votes)
• 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.  •Huge Cock •Muscle Growth •Muscle/Strength •Age Difference  Added Aug 2020 3,727 words 5,750 views
• 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.  •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/...  Added Jul 2018 Updated Oct 2018 28 parts 88,398 words 80,625 views 4.8 stars (39 votes)

• Chris olympus by FanTCMan  [  ]    •Cock Growth •Straight to Gay •Muscle Growth •Muscle/Strength •Getting Hairy •Age Difference •Incest •Father/Son  Added Dec 2002 3 parts 9,167 words 37,101 views 4.5 stars (21 votes)
• 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.  •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  Added Jan 2020 Updated May 2021 8 parts 25,601 words 18,126 views
• Coach’s big surprise by MuscleMike  [  ]  Josh is struggling to keep up with the rest of the wrestling team, and he’s afraid to get cut. Luckily, a former student of Coach Smith sends him something that’ll make them both become the men they’ve always dreamed of becoming.  •Cock Growth •Huge Balls •Huge Cock •Hyper Cock •Hyper Muscle •Muscle Growth •Muscle/Strength •Getting Taller •Plausible Size Difference •Size Increase •Age Progression •Getting Hairy •Age Difference  Added Feb 2020 2 parts 2,597 words 26,034 views 4.7 stars (16 votes)
• 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.  •Cock Growth •Huge Cock •Other Mental Changes •Straight to Gay •Muscle Growth •Muscle/Strength •Increased Libido •Getting Hairy •Age Difference •Incest •Father/Son  Added Dec 2002 2 parts 7,919 words 33,859 views 4.6 stars (11 votes)
• 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.  •Cock Growth •Huge Cock •Muscle/Strength •Age Difference •First Time/Virgin •Incest •Father/Son  Added Sep 2015 22,148 words 25,163 views 4.8 stars (12 votes)
• The cowboy by Chance Riverwind  [  ]    •Cock Growth •Huge Cock •Muscle/Strength •Giants •Age Difference •Incest •Father/Son  Added Jul 2002 1,967 words 18,402 views 2.3 stars (6 votes)

• 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!  •Muscle Growth •Muscle/Strength •Age Difference  Added Apr 2020 7,446 words 8,025 views 4.5 stars (8 votes)
• 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.  •Huge Cock •Muscle Gut •Muscle/Strength •Plausible Size Difference •Age Difference •Incest •Father/Son •Dom/Sub •M/M  Added Sep 2018 Updated May 2019 2 parts 4,961 words 28,908 views 4.7 stars (11 votes)
• 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.  •Cock Growth •Huge Cock •Age Difference •Incest •Father/Son  Added Mar 2004 4,994 words 48,834 views 4.7 stars (27 votes)
• 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.  •Cock Growth •Huge Cock •Muscle Growth •Muscle/Strength •Increased Libido •Size Increase •Age Difference •Incest •Father/Son •Twins •Destruction/Violence •M/t  Added Feb 2003 6 parts 14,639 words 29,321 views 3.2 stars (20 votes)
• Damian and the three muscleteens by hyperboi  [  ]    •Cock Growth •Huge Cock •Hyper Cock •Straight to Gay •Muscle Growth •Muscle/Strength •Age Difference •Incest •Brothers •Father/Son •Twins •Infectious  Added Dec 2012 5 parts 8,169 words 55,082 views 4.3 stars (27 votes)
• 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.  •Cock Growth •Muscle Growth •Getting Handsomer •Suggestion •Age Difference •M/M/M  Added Feb 2023 2,471 words 2,918 views 4.6 stars (10 votes)
• 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.  •Huge Cock •Hyper Cock •Giants •Size Increase •Age Difference •Incest •Father/Son •Destruction/Violence  Added Aug 2019 1,624 words 11,775 views 4.1 stars (16 votes)
• 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.  •Cock Growth •Huge Cock •Hyper Cock •Self-suck •Hyper Cum •Muscle Growth •Age Difference •Incest •Father/Son •Thanksgiving •M/M •M/M/M  Added Apr 2022 Updated May 2022 3 parts 9,852 words 8,348 views 4.9 stars (36 votes)
• 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.  •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  Added Nov 2018 3 parts 11,737 words 30,617 views 4.6 stars (17 votes)
• 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.  •Muscle/Strength •Age Difference •Dom/Sub •Humiliation •Sex-Slave  Added Jun 2020 5,094 words 4,324 views
• A donkey dick at the senior rehab by Flynn  [  ]  It’s all right there in the title.  •Huge Cock •Age Difference •Seniors  Added Jun 2014 1,606 words 17,333 views 3.8 stars (10 votes)
• 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.  •Straight to Gay •Getting Fatter •Age Difference •M/M  Added Feb 2022 4,588 words 3,372 views

• 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.  •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 •Series  Added Apr 2019 Updated May 2021 40 parts 365,561 words 128,377 views 3.4 stars (5 votes)
• Endmyths by Taur Reg  [  ]  Transformations spread through an entire town—but why?  •Multilimb •Age Difference •Incest •Father/Son •Centaurs •Naga •Satyrs •Shapeshifting  Added Aug 2013 12 parts 18,537 words 17,560 views 4.8 stars (6 votes)
• 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.  •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 •Infectious •Merging •Shared Body •Centaurs •M/M •M/M/M  Added Jul 2021 Updated Oct 2022 16 parts 36,524 words 16,596 views 4.9 stars (16 votes)

• 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.  •Cock Growth •Huge Cock •Public Orgasm •Muscle/Strength •Age Difference •First Time/Virgin •M/M  Added Dec 2007 3 parts 36,548 words 31,813 views 4.9 stars (21 votes)
• 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.  •Cock Growth •Huge Cock •Hyper Cock •Self-suck •Muscle Growth •Muscle/Strength •Age Difference •Incest •Brothers •Father/Son •Twins  Added Jan 2021 Updated Feb 2021 4 parts 14,631 words 23,402 views 4.9 stars (30 votes)
• 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!  •Cock Growth •Huge Cock •Muscle Growth •Muscle/Strength •Gradual Change •Age Difference  Added Oct 2020 4,445 words 7,078 views

• 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!  •Muscle Growth •Muscle/Strength •Age Difference  Added May 2020 1,135 words 5,600 views 4.6 stars (7 votes)

• 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.  •Cock Growth •Huge Cock •Muscle Growth •Muscle/Strength •Transformation •Size Increase •Human to Animal/Anthro •Age Difference •Anthro/Scaly •Dragons  Added Jan 2021 2 parts 15,054 words 6,318 views 4.9 stars (9 votes)
• 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.  •Straight to Gay •Public Nudity •Suggestion •Age Difference •Incest •Father/Son •Sex-Slave •Hypnosis •Mind Control •M/M  Added Mar 2022 3 parts 10,928 words 2,741 views 4.2 stars (6 votes)

• I think... by EdIam  [  ]  Larry wants to think for Zack.  •Other Mental Changes •Straight to Gay •Muscle/Strength •Age Difference •Incest •Brothers •Twins •Dom/Sub •Humiliation •Hypnosis •Mind Control •M/M •M/M/M  Added Apr 2021 Updated Aug 2022 12 parts 151,254 words 16,968 views 4.2 stars (11 votes)
• 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.  •Cock Growth •Huge Cock •Hyper Cock •Hyper Cum •Replication •Muscle Growth •Age Regression •App •Retcon •Age Difference •Incest •Brothers •Father/Son •Nonconsensual change •Infectious •All Dialog •Complete •M/M •M/M/M/...  Added Jun 2020 2,248 words 10,857 views 4.9 stars (17 votes)

• 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.  •Huge Cock •Muscle Growth •Muscle/Strength •Getting Taller •Age Difference  Added May 2020 10 parts 15,365 words 5,824 views 4.3 stars (7 votes)

• 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!  •Huge Cock •Pec Fucking •Muscle Growth •Muscle/Strength •Gradual Change •Age Difference  Added May 2020 5 parts 6,266 words 3,602 views
• 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!  •Huge Cock •Muscle Growth •Muscle/Strength •Age Difference  Added Dec 2020 3 parts 3,514 words 3,967 views

• The lawnmower boy by Anonymous  [  ]    •Cock Growth •Huge Cock •Muscle Growth •Muscle/Strength •Age Difference  Added Jul 2006 6,172 words 23,245 views 4.7 stars (7 votes)
• 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.  •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 •Complete •Set during the Pandemic •M/M •M/M/M/...  Added Apr 2021 3,110 words 11,100 views 4.7 stars (17 votes)
• 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.  •Muscle Growth •Muscle/Strength •Always Shirtless •Man Scent •Gradual Change •Transformation •Size Increase •Getting Hairy •Age Difference •Incest •Father/Son •Werebears •Supernatural •Complete •Series •M/M  Added Dec 2017 Updated Apr 2019 11 parts 68,079 words 41,287 views 4.8 stars (37 votes)
• 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.  •Cock Growth •Huge Balls •Huge Cock •Wings •Hyper Strength •Getting Handsomer •Retcon •Suggestion •Age Difference •Incest •Father/Son •Flying •Complete •Medieval(ish) •M/M  Added Feb 2022 2 parts 6,212 words 6,937 views 4.8 stars (15 votes)

• Mass X by Max Mann  [  ]  Five short stories of men getting bigger and sexier, through the use of “Mass X”.  •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  Added Feb 2005 5 parts 19,019 words 44,241 views 4.7 stars (16 votes)
• 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.  •Size Increase •Body Suit •Age Difference •Incest •Father/Son •Lycra/Spandex •Halloween •Superhero/Supervillain •Stories with Images •M/M  Added Feb 2016 2 parts 2,851 words 34,416 views 3.6 stars (16 votes)
• 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.  •Muscle Growth •Muscle/Strength •Age Difference  Added Jun 2020 3,305 words 3,484 views
• 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?  •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 •Dom/Sub •M/M  Added Nov 2021 Updated Jan 2022 3 parts 14,933 words 10,403 views 5.0 stars (14 votes)
• 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!  •Huge Cock •Muscle/Strength •Age Difference •Dom/Sub  Added Jun 2020 1,855 words 2,812 views
• 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.  •Cock Growth •Huge Balls •Huge Cock •Muscle Growth •Muscle/Strength •Always Shirtless •Increased Libido •Gradual Change •Plausible Size Difference •Size Increase •Age Regression •Getting Hairy •Age Difference •First Time/Virgin •Incest •Brothers •Father/Son •Werebears •Supernatural •Shapeshifting •Series •M/M  Added Nov 2021 Updated Feb 2023 8 parts 40,542 words 13,559 views 5.0 stars (20 votes)
• 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).  •Cock Growth •Hyper Cock •Hyper Cum •Muscle Growth •Muscle/Strength •Age Difference •First Time/Virgin •Incest •Brothers •Father/Son •Twins •Restraints  Added Sep 2004 9 parts 26,085 words 67,658 views 4.8 stars (50 votes)
• 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!  •Muscle Growth •Muscle/Strength •Age Difference  Added Nov 2020 4 parts 3,143 words 3,522 views
• 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.”)  •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/F •M/M •M/M/F •M/M/M •M/M/M/... •M/t •t/t  Added Jul 2002 Updated Jun 2021 29 parts 222,742 words 146,041 views 4.5 stars (25 votes)
• 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.  •Huge Cock •Muscle/Strength •Age Difference •Incest •Father/Son  Added Feb 2017 2 parts 18,403 words 16,256 views 4.7 stars (11 votes)
• 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.  •Huge Cock •Age Difference •Incest •Father/Son  Added Oct 2020 2,194 words 8,184 views 3.5 stars (11 votes)
• 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.  •Cock Growth •Huge Cock •Straight to Gay •Muscle Growth •Muscle/Strength •Age Difference •Incest •Father/Son •M  Added Oct 2003 3,842 words 111,447 views 3.9 stars (32 votes)

• 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.  •Huge Cock •Multicock •Age Difference •Incest •Father/Son  Added Jan 2016 Updated Nov 2019 2 parts 11,319 words 18,295 views 4.5 stars (12 votes)
• The night shift by Dreamtransformer  [  ]    •Muscle/Strength •Age Difference •Incest •Father/Son  Added Dec 2013 1,239 words 12,900 views
• 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.  •Cock Growth •Huge Cock •Muscle Growth •Muscle/Strength •Suggestion •Age Difference •Incest •Father/Son  Added Jun 2014 Updated Jul 2014 2 parts 10,894 words 39,056 views 4.6 stars (37 votes)
• 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!  •Huge Cock •Muscle Growth •Muscle/Strength •Gradual Change •Age Difference  Added Sep 2020 5 parts 4,245 words 3,612 views

• 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?  •Muscle Breast •Muscle/Strength •Age Difference •Stories with Images  Added May 2020 2,602 words 8,931 views
• 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!  •Muscle Growth •Muscle/Strength •Getting Handsomer •Age Difference •Incest •Father/Son •M/M/M/... •M/t •t/t  Added Dec 2002 1,575 words 19,367 views 4.7 stars (6 votes)
• 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.  •Cock Growth •Muscle Growth •Muscle Gut •Transformation •Size Increase •Human to Animal/Anthro •Age Difference •Nonconsensual change •Anthro/Furry •Fantasy Realm •Mind Control  Added Jun 2018 5,070 words 13,219 views 4.9 stars (11 votes)

• Reality Pack by Thorn  [  ]  What happens when the program you’re working on for school has a downloadable mod? You investigate it of course!  •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  Added Nov 2020 Updated Feb 2021 15 parts 79,094 words 46,345 views 4.9 stars (37 votes)
• 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.  •Huge Cock •Straight to Gay •Muscle/Strength •Suggestion •Age Difference •Incest •Brothers •Father/Son •Bisexual •Hetero Sex •Dom/Sub •Series  Added Jun 2020 8,270 words 8,060 views

• Sam and Bolt by MaxMorphs  [  ]  Sam’s father, Bolt, shares with his size-hungry son the secrets of becoming truly huge.  •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/...  Added Sep 2016 Updated Dec 2016 11 parts 48,242 words 75,439 views 3.9 stars (55 votes)
• 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…  •Cock Growth •Huge Cock •Muscle Growth •Muscle/Strength •Age Difference •Seniors •Christmas •Series •M/M  Added Dec 2018 2 parts 6,719 words 8,957 views 5.0 stars (5 votes)
• 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.  •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  Added Apr 2022 Updated May 2022 3 parts 8,409 words 12,004 views
• 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.  •Cock Growth •Multiarm •Multilimb •Muscle Growth •Size Increase •Age Difference •Nonconsensual change •Androids/Cyborgs •M/M  Added Jul 2018 Updated Nov 2018 3 parts 13,885 words 9,447 views 5.0 stars (9 votes)
• 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.  •Muscle Growth •Muscle/Strength •Size Increase •Age Difference •Incest •Father/Son  Added Oct 2005 2 parts 6,769 words 46,333 views 4.1 stars (14 votes)
• 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.  •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  Added Oct 2009 Updated Nov 2019 50 parts 221,027 words 212,067 views 4.3 stars (58 votes)
• 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.  •Muscle Gut •Muscle/Strength •Plausible Size Difference •Age Difference •Seniors •M/M  Added Aug 2021 Updated Oct 2021 3 parts 23,318 words 7,266 views 4.9 stars (7 votes)
• 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…  •Huge Cock •Suggestion •Age Difference •Incest •Father/Son •Mind Control  Added Dec 2018 2,749 words 9,635 views 4.4 stars (10 votes)

• The touch by TylerGermany  [  ]  Nick is dosed with nanobots that allow him to grow and shrink others with just a touch.  •Cock Growth •Huge Cock •Muscle Growth •Muscle/Strength •Nanotech •Age Difference •M/M  Added Mar 2014 Updated Apr 2014 2 parts 10,780 words 24,466 views
• 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.  •Muscle Growth •Muscle/Strength •Age Difference •Incest •Father/Son •Twins •Androids/Cyborgs •Space Travel •Complete •M/M •M/M/M/... •M/t •t/t  Added Jul 2002 2 parts 6,947 words 28,834 views 5.0 stars (27 votes)
• 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.  •Muscle Growth •Increased Libido •Age Progression •Getting Hairy •Age Difference •Nonconsensual change •Metabods 25 •M/M  Added Jan 2022 3,571 words 5,901 views 4.8 stars (11 votes)
• Twin studs by Anonymous  [  ]    •Huge Cock •Multicock •Multiarm •Multilimb •Age Difference •First Time/Virgin •Incest •Brothers •Father/Son •Twins  Added Jul 2014 3 parts 42,539 words 16,275 views 4.0 stars (22 votes)

• 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.  •Huge Cock •Muscle Growth •Muscle/Strength •Age Difference •Incest •Father/Son  Added Dec 2013 1,418 words 27,860 views 3.6 stars (7 votes)
• Uncle C by Portowulf  [  ]  Charles finds a trinket at a small store in the city that brings unexpected changes.  •Cock Growth •Straight to Gay •Muscle Growth •Increased Libido •Size Increase •Age Progression •Age Regression •Age Difference •First Time/Virgin •Incest •M/M  Added Jun 2020 3,028 words 7,202 views

• Vacation by muscle.growth  [  ]  Just a simple vacation sleepover with Matt, Alan, and Alan’s dad working on something weird in his basement lab.  •Cock Growth •Huge Cock •Muscle Growth •Muscle/Strength •Age Difference •Father/Son  Added Feb 2009 1,860 words 20,221 views 4.7 stars (9 votes)
• 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.  •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  Added Jun 2021 6,302 words 7,294 views 5.0 stars (11 votes)
• 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.  •Huge Cock •Muscle Growth •Muscle/Strength •Size Increase •Age Difference •Incest •Father/Son •Infectious  Added Jan 2016 Updated May 2016 2 parts 6,753 words 38,583 views 4.7 stars (24 votes)

• Welcum to Hell by Alex Anders  [  ]  The forces of Hell welcome their newest recruit.  •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  Added Oct 2022 Updated Mar 2023 7 parts 15,139 words 6,543 views 4.9 stars (7 votes)
• Werequeer by Pfieffer  [  ]  A dad helps his son through his first transformation into a WereQueer.  •Cock Growth •Huge Balls •Hyper Cock •Hyper Cum •Transformation •Age Difference •Incest •Father/Son  Added Apr 2004 2,426 words 29,913 views 4.9 stars (18 votes)
• 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?  •Cock Growth •Huge Cock •Hyper Muscle •Hyper Strength •Muscle Growth •Muscle/Strength •Getting Taller •Size Increase •Getting Hairy •Age Difference  Added Jan 2021 1,441 words 9,864 views
• 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.  •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  Added Sep 2021 6,734 words 4,668 views
• 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!  •Muscle Growth •Muscle/Strength •Age Difference  Added Nov 2020 5 parts 3,258 words 2,805 views

• 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.  •Cock Growth •Huge Cock •Muscle Growth •Muscle/Strength •Muscle Worship •Getting Taller •Age Difference •Incest •Father/Son •Dom/Sub •M/M •M/M/M  Added Jul 2013 Updated May 2017 7 parts 27,675 words 45,923 views 4.4 stars (18 votes)