Increased Libido

Stories involving a significant increase in the need for sex.

Related: Ass Growth; Belly Growth; Breast Expansion; Detachable; Foot Growth; Getting Handsomer; Gradual Change; Male Pregnancy; Transformation; Voice Deepening.

Child of: Other Physical Changes.

Top Stories: “The salt”; “Second puberty”; “Enlargement”; “His cock gets huge”; “Navy experiment”; “Bigger issues: Ultimate growth”; “Transform: New Blood”; “Sk8r dreams”; “Tim’s adventure”; “Just a little bigger”.

Recently Updated: “The Ixlutani”; “Bottoms up”; “Resolutions”; “The expedition”; “Fountain of life”; “Hulkster and Hoppy”.

27 stories found. Total word count: 859,808.

• Bigger issues: Ultimate growth by muscl4life  CockUp Cock HyCock MuscUp Musc Worship Libido SizeUp Infect Series   Added Nov 2013 Updated Dec 2013 6 parts 31,808 words 35,826 views 4.4 stars (7 votes)
• Bottoms up by Ziel  CockDn Cock Libido Hum Nonc Alcohol  Chess, a haute and hung twink, is too proud and too big to bottom which is a shame given how nice his ass is! But things change when he visits a trendy new club for his birthday. Added Jul 2021 7,092 words 1,858 views

• Cadence by BRK  CockUp Cock MuscUp Musc Libido Handsomer Taller PSD SizeUp Viol Immort Ancient M/M  Lucius, an ex-ancient Roman whose peculiar curse involves the beauty of the men around him, suddenly finds that everything he thought he knew about his uncontrollable abilities has changed when he's discovered by a trooper one night sleeping in his car on a lonely stretch of Midwestern highway. Added Nov 2016 Updated Mar 2019 6 parts 30,727 words 15,214 views 4.6 stars (12 votes)
• The clockwork dial by RdyRoger  CockUp Cock MuscUp Musc Libido Grad AgeDn Hairier  A man finds what looks like a beat-up old pocket watch, but when he gets it working again he finds its intricate dials and mechanisms are actually designed to make other guys incrementally—like his roommate Gabe, for example. Added Apr 2012 3,603 words 20,252 views 4.7 stars (16 votes)
• Company guys by FanTCMan  CockUp Cock Mental 2Gay MuscUp Musc Libido Hairier AgeDiff Inc Dad  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. Added Dec 2002 2 parts 7,919 words 28,667 views 4.7 stars (10 votes)
• Cursed cocks by CockTFBoi  CockUp CockDn CumInf HyCum PublicOrg FTM Addict 2Gay MuscUp Scent Libido Grad Hairier HairDecr Nonc HyPher M/M M/M/M/...  Marcus is having a horny night in the dorm when an inadvertent wish by his roommate sends him on a path to a new life. Added Aug 2020 8 parts 25,154 words 7,411 views

• Daemos island by Charles Westfall  CockUp Cock MuscUp Musc Libido SizeUp AgeDiff Inc Dad Twins Viol  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. Added Feb 2003 6 parts 14,639 words 26,071 views 3.2 stars (20 votes)

• Enlargement by Boston Guy  CockUp Balls Cock HyCock 2Gay MuscUp Musc HyAnus Libido Grad Tf SizeUp Nano Nonc Infect  A medical engineer develops nanotechnology that could cure the world of multiple diseases. But his true motivation is not so noble. Added May 2013 Updated Jun 2013 5 parts 14,943 words 42,926 views 4.5 stars (20 votes)
• The expedition by BRK  AlwHard CockUp Cock XCock XLeg XLimb 3Legs HyStr MuscUp Musc NoShirts Libido PSD SizeDn SizeUp TongueGr AgeDiff  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. Added Jul 2021 5 parts 8,423 words 2,310 views

• Fountain of life by NaughtyKitchenware  AlwHard CockUp Cock HyCock NipCum PublicOrg XFace XCock XArms XLimb XPec XTongue Stack MuscUp PointyEars Libido Tf Taller Giant SizeUp 2Animal Hairier TongueGr Fur Supn  During a hot summer morning, a jogger visits several unusual drinking fountains that will not only change him, but probably also the world. Added Jul 2021 3,730 words 2,850 views
• From the files of the Magic Misuse Office by BRK  CockUp Cock XCock XHead XArms XLimb XTorso Rep 2Gay MuscUp Libido Tf SocMed Inc Twins Merg M/M M/M/M  High-ranking magilegal investigator Liam O'Brien reports on a YouTube video in which twin college students have an illicitly magical effect on anyone watching. Added Sep 2017 Updated Jul 2018 4 parts 13,949 words 12,703 views 4.9 stars (29 votes)

• Heavy quarantine by Portowulf  CockUp HyCum MuscUp BellyUp Libido Fatter Infl Pandem  Boyfriends Vincent and Coy ride out the quarantine together, for extended time. Added Apr 2020 2,778 words 5,035 views 4.7 stars (9 votes)
• His cock gets huge by Jack Hardwood  CockUp Balls Cock HyCock HyCum MuscUp Libido  Male model Pietro washes up on a remote island inhabited by a society of men where everyone wants their cock to be as big and fat as humanly possible. Pietro just wants to go home, but his almost constant boner is getting bigger and bigger, and he doesn’t know how much longer he’ll be able to walk. Added Dec 2017 Updated Apr 2018 8 parts 14,650 words 40,306 views 4.8 stars (48 votes)
• Hulkster and Hoppy by Also Known As  CockUp Cock MuscUp Scent Libido Handsomer Grad Taller PSD SizeUp  Jeremy “Hoppy” Hopkins and Alexander “The Hulkster” Hogan were best friends in high school, but at the twenty-year reunion, the Hulkster discovers what Hoppy has been up to all those years in-between. Added Feb 2021 Updated Jul 2021 23 parts 118,666 words 18,957 views 5.0 stars (51 votes)

• The institute by FanTCMan  CockUp Dumber Mental MuscUp Musc Libido Hairier  Two intrepid newsmen get a little too close to the story. Added Dec 2002 2,641 words 11,182 views
• The Ixlutani by Lloyd Irving  CockUp CockDn CTheft Cock 2Gay MuscDn Musc Libido Tf Taller PSD SizeDn SizeUp Bi Het Supn  Kyle Anderson set out with his best friend Ben Miller for one last hurrah, revisiting the woods behind their childhood homes and the mysterious cave they discovered there, before Kyle’s impending nuptials with his longtime girlfriend, Olivia. What neither man knew was that after that day neither their bodies nor their relationship would ever be the same. Added Jun 2021 Updated Jul 2021 7 parts 49,654 words 6,399 views 4.9 stars (15 votes)

• Just a little bigger by Dream Big  CockUp Cock Self MuscUp Musc Libido BreastUp Grad Tf Taller Bi Het  Drew has two problems: he’s got a crush on his two best friends, Vic and Sarah, and he’s self-conscious about being short and skinny. He’s not prepared for the changes that develop in both departments on their fateful post-graduation trip to New York City. Added Dec 2019 Updated Mar 2020 15 parts 31,368 words 20,449 views 4.6 stars (14 votes)

• Morphogenic steroids by RdyRoger  CockUp Balls Cock Self MuscUp Musc Libido Grad Taller PSD SizeUp Hairier Infect  Rod’s dad is working on a new technology that makes small things bigger and big things huge, with incredible implications for food supplies and beyond—only it only lasts for five hours. Rod figures being bigger for five hours… that would be pretty awesome. Added Oct 2019 4 parts 15,297 words 15,086 views 4.4 stars (11 votes)

• Navy experiment by BRK  CockUp Cock XDig XAbs XCock XArms XLimb 3Legs Mental MuscUp Musc Libido PSD  The new protocol of vaccinations on the U.S.S. Tulsa developed by Dr. Tosk had very deliberate side-effect: your body is affected by whoever you lust for. Tosk plans for the sailors to start lusting after his impressive form—but who does Tosk lust for? Added Mar 2010 4 parts 5,764 words 38,232 views 4.4 stars (14 votes)

• Resolutions by BRK  CockUp Balls Cock Self Mental MuscUp Libido TongueGr Retcon Nonc New Years  Ray intercepts a seemingly magical book of fill-in-the-blank New Year’s resolutions his boss, Danny, had ordered, and starts making plans for improving Danny’s too-boring sex life. Added Jan 2021 Updated Jul 2021 5 parts 28,477 words 10,901 views 5.0 stars (22 votes)

• The salt by RdyRoger  CockUp Cock MuscUp Musc Worship Libido Grad Taller SizeUp TongueGr Inc Bro Series  Trav gets his hands on some salts that cause all kinds of sexy growth and transformation. Using them on himself is great, but growing other people without their realizing it is even more fun. Added Jun 2010 9 parts 35,754 words 71,271 views 4.7 stars (18 votes)
• Second puberty by JayPat  CockUp Cock HyStr MuscUp Musc Libido SizeUp Bi Viol HyPher Series  Finding out you’re a product of genetic engineering and about to go through your second puberty is shocking enough, but the unforeseen repercussions with school, family, and friends are what really change everything. Added Sep 2012 15 parts 91,454 words 61,074 views 4.8 stars (28 votes)
• Sk8r dreams by Reaver  CockUp Cock Rep NoShirts Libido Tf DeeperVoice AgeDn Race App Retcon Nonc Infect Mind Series  The Maker is an app that gives you the ability to remake the world around you. That means a better house, a hotter body—and it definitely means turning a few guys in your life into happy, hunky skater bois. Added Oct 2003 19 parts 58,830 words 32,922 views 4.2 stars (18 votes)
• The smell of lust by Seth Peterson  Cock 2Gay MuscUp Libido Tf SizeUp Hairier Nonc HyPher Fur Scaly Dragon M/M  I did a thing!! Okay, I accidentally bathed myself in extremely potent, gay-causing, transformative pheromone juice. But it’s all good, right?? Added Jun 2016 11,127 words 19,708 views 4.2 stars (13 votes)

• Tim’s adventure by WordShop  CockUp Cock HyCum MuscUp Musc Libido Grad SizeUp Hairier Virgin  Tim finds romance becomes a little more complicated when muscle growth and hypermasculity is involved. Added Jan 2018 Updated Feb 2018 5 parts 34,729 words 21,630 views 4.4 stars (14 votes)
• Transform: New Blood by Also Known As  AlwHard CockUp Cock Self XCock MuscUp Musc Worship Scent Libido DeeperVoice SizeUp Virgin Infect Fly Series  The formula Carlos developed, Transform, has made him and his friends into veritable gods. Soon their numbers will be growing, thanks in part to a video featuring a guy known only as Self-Suck Sam. Added Jan 2014 47 parts 188,423 words 33,103 views

• What happened by Dream Big  CockUp Cock MuscUp Musc Libido Tf Bi  When Daniel meets up after college graduation with his high school friends Chris and Jane for a beach vacation, it turns out Chris has some important news: first, he’s into both of them, and second, he’s got access to his family’s secret body transformation serum, and he’s willing to share. Added Nov 2019 2 parts 8,209 words 6,559 views 5.0 stars (7 votes)