An anus that's been made rather more accommodating than normal.
Tag Group: Transformation.
Addiction by Hatman “… I gotta have more! I need more! Give… me… MORE!” pleads our young scientist. Added May 2010 38k views 4.1 stars (12 votes) 1,916 words •Cock Growth•Huge Cock•Cum inflation•Hyper Cum•Stretchy•Hyper Anus
Adventures of an Ivy League himbo by iHeywood This is a story all about how Liam Montgomery became the best himbo ever while a student at an Ivy League university. 2 parts Added Jun 2022 11k views 4.9 stars (16 votes) 5,749 words •Huge Cock•Hyper Cock•Nipcocks•Hyper Cum•Nipple Emissions•Multicock•Male Pregnancy•Incest•Father/Son•Set in the Future•Hyper Anus •M/M•M/M/M
Best body modification ever by Oneleg Smith Mike meets an unconventional surgeon who specializes in improving your body and making sex better in unexpected ways. Added Mar 2019 20k views 4.1 stars (8 votes) 1,994 words •Cock Growth•Huge Cock•Transformation•Rubber/Latex•Hyper Anus
Emission transmission by Cumguts Big grey orc Burz gets a mysterious gift in the mail, and incidentally discovers that he might have a future career in streaming on a new kink website geared explicitly toward cum inflation enthusiasts. 3 parts Added Jun 2022 8,102 views 4.3 stars (10 votes) 3,593 words •Cum inflation•Hyper Cum•Muscle Gut•Belly Growth•Orcs•Urban Fantasy•Stories with Images•Hyper Anus •M
Enlargement by Boston Guy A medical engineer develops nanotechnology that could cure the world of multiple diseases. But his true motivation is not so noble. 5 parts Added May 2013 59k views 4.6 stars (29 votes) 15k words •Cock Growth•Huge Balls•Huge Cock•Hyper Cock•Straight to Gay•Muscle Growth•Muscle/Strength•Increased Libido•Gradual Change•Transformation•Size Increase•Nanotech•Nonconsensual change•Infectious•Hyper Anus •M/M•M/M/M•M/M/M/...
Exotica by Hidevidence A collection of short stories set in various fantastical worlds specifically designed to facilitate incredible, absurd sexual pleasure between men. 2 parts Added Nov 2022 Updated 31 Dec 2022 6,886 views 4.7 stars (9 votes) 3,474 words •Always Hard•Cock Growth•Huge Cock•Hyper Cock•Prehensile Cock•Always Cumming•Hyper Cum•Multicock•Replication•Other Mental Changes•Transformation•Retcon•Selfcest•Hyper Anus •M/M/M/...
Gym story by Kisho Nakamura Alex decides to join a gym. One of the trainers there provides him with something that may aid in his development. Added Jul 2009 24k views 4.3 stars (9 votes) 4,464 words •Cock Growth•Huge Cock•Cum inflation•Muscle Growth•Muscle/Strength•Hyper Anus •M/M
The inflation of pleasure by Lionel E. Linklander A man discovers that his friend’s huge cock and its ability to swell with cum and becomes obsessed with making it hold as much cum as possible. The result is an inflation of cum that is almost out of control. Added Jul 2023 5,845 views 4.5 stars (13 votes) 1,638 words •Cock Growth•Huge Balls•Ball Growth•Hyper Cock•Cum inflation•Cum Milking•Hyper Cum•Immobility•Stretchy•Belly Growth•Forced Growth•Complete•Hyper Anus •M/M
It’s never enough by K. Theeunknown All Trent wants is companionship, until his inner size queen takes him down a deep rabbit hole. Will he ever be able to clean up the nearly uncontrollable mess he’s made? 3 parts Added Jan 2023 Updated 11 Mar 2023 22k views 4.8 stars (33 votes) 6,734 words •Cock Growth•Huge Balls•Ball Growth•Huge Cock•Hyper Cock•Cum inflation•Hyper Cum•Nipple Emissions•Addiction•Straight to Gay•Hyper Muscle•Hyper Strength•Immobility•Muscle Growth•Muscle Gut•Butt Growth•Getting Taller•Forced Growth•Size Decrease•Size Increase•Hyper Anus •M/M
Just between fiends by Cumguts Regular buff guy Dean is met with an unwanted guest (or two) over breakfast. Things get considerably stickier when he tries to get rid of them. Added Nov 2020 11k views 4.6 stars (11 votes) 3,422 words •Hyper Cock•Cum inflation•Hyper Cum•Muscle Breast•Voluptuous Men•Demons•Hyper Anus
Karma pills by Musiker Steve has been bullying the other members of Matt's Gym for ten years. When Matt gives Steve a new kind of muscle-enhancing pill, he conveniently forgets to mention some significant side effects. 5 parts Added Jun 2019 Updated 27 Jul 2019 30k views 3.8 stars (19 votes) 24k words •Cock Growth•Cock Shrinking•Cockless•Huge Balls•Huge Cock•Hyper Cum•Getting Dumber•Other Mental Changes•Straight to Gay•Muscle Growth•Muscle/Strength•Gradual Change•Getting Taller•Plausible Size Difference•Size Increase•Dom/Sub•Humiliation•Nonconsensual change•Sex-Slave•Bodily Fluids•Anthro/Furry•Mind Control•Hyper Anus •M/M•M/M/M
Modern rites by red_king Matt’s life changes forever when he receives divine investiture from an old fertility god, fallen from the pantheon, in exchange for his devotion and cooperation in finding more followers. At first it sounded like work, but soon he’s having too much fun to care. 16 parts Added Dec 2018 Updated 4 Jun 2022 37k views 4.7 stars (38 votes) 47k words (#76) •Cock Growth•Huge Cock•Hyper Cock•Cum inflation•Hyper Cum•Pec Fucking•Muscle Breast•Muscle Growth•Butt Growth•Getting Handsomer•Transformation•Plausible Size Difference•Size Increase•Destruction/Violence•Restraints•Pagan gods•Supernatural•Immortality•Hyper Anus •M/M•M/M/M
Muscle monster by Cumguts Looking for a second glimpse of an impossibly muscular mysterious gym crush, you decide to take some advice and spend an evening checking out his blog. You and your cock might just have a new favorite website. Added Sep 2023 5,766 views 4.7 stars (3 votes) 4,049 words •Hyper Cock•Hyper Cum•Nipple Emissions•Hyper Muscle•Muscle Breast•Muscle Growth•Pointy Ears•Voluptuous Men•Demons•Orcs•Urban Fantasy•Complete•Stories with Images•Hyper Anus •M
SNU-5|VU by DracumSum Nathan and Nick have to complete a biochem project on the metahumans caused by the failed SNU-5 nanobot project—only they don’t know any, and the brief random encounter Nathan had at a bus stop the other day won’t help them. Or will it? Added Feb 2022 8,522 views 5.0 stars (6 votes) 6,053 words •Cock Growth•Cut to Uncut•Huge Balls•Huge Cock•Hyper Muscle•Muscle Growth•Increased Libido•Foot Growth•Gradual Change•Transformation•Getting Taller•Giants•Plausible Size Difference•Size Increase•Hairless•Nanotech•Infectious•Set in the Future•Hyper Anus •M/M