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Orc Roots

Orc Roots For TiranMaster By Draconicon Troy pulled up to the old house and left the engine idling for a few minutes before he finally turned it off. A part of him wished that he hadn't bowed to his parents' request to come...

Bondage, Cock Growth, Fingering, Growth, Hypnosis, Intelligence drain, Kidnapping, M/M, Masturbation, Mental deterioration, Mind Control, Modern, Muscle, Muscle Growth, Orc, Transformation, Tribal

Turning Over A New Leaf

He was also very concerned about serathin's advanced mental deterioration...

Anal, Brutification, Gay, M/M, Muscle Growth, Oral, Transformation, Werewolf

Furniture

Being used like this accelerated the furniture's - caprice's - mental deterioration. she watched his face contort in pleasure and felt pride that _she_ was the one doing it.

Bear, Bisexual, Breathplay, Captivity, Choker, Cock, Creampie, Fox, Hindpaw, M/F, M/F/F, Mind Control, NC, Non-Consensual, Ownership, Paws, Pussy, Rabbit, Smothering, Straight, Tickling, Vaginal

Lost with internity

Recognizing multiple symptoms of mental deterioration and fatigue, he reached into his pocket, producing several stim-pills, consuming them before continuing onward.

Alien, Bizarre, Harsh, Machine, No-Yiff, Realistic, Sci-Fi, Short, Supernatural, Violence (Not In Yiff)

Into the Horizon: Problems Revealed

Bane had completely mentally deteriorated, and they had not realized it. there was a shared sense of guilt among them for not seeing it sooner.

Drama, Friendship, M/M, Suicide

The Domesticated: Chapter 8

That would have been bad enough, but long-term use of those drugs inevitably led to mental deterioration, to the point where the drugs had to be fed to the domesticated in question constantly just to keep them in that happy haze so that they didn't realize

Anthro, Human, Master/Slave, Modern, Mouse, Nudity, Series, Slave negotiations, Slavery, Worldbuilding, money, no sex

The Shift

This short little number was inspired by 'i have no mouth, and i must scream', in at least so far as it concerns the mental deterioration of a handful of characters within an existential nightmare.

Anal, Anthro, Cum, Ejaculation, Equine, Ferret, Fingering, Horse, M/M, Male/Male, Non-Consensual, Rodent, Sci-Fi, Sex

Giantess Toriel X Alphys: Incestual Apocalypse

Extremely painful head invasion, mind-control puppetry, child abuse, intensely fetishistic incestual mayhem between toriel and her immediate family, crippling mental deterioration, revenge rape and incredibly vast amounts of unexpected hilarity ensue.

Abuse, Adult Content, Anthro, BDSM, Bisexual, Blood, Blowjob, Blush, Bondage, Breastfeeding, Breasts, Caprine, Cock And Balls Torture, Comedy, Creampie, Cumshot, Dildo, Domination/Submission, Dominatrix, Ear Fetish, Ejaculation, Elephant, Erection, Family, Fellatio, Femdom, Fingering, Foot Fetish, Foot Worship, Footjob, French Kissing, Gangbang, Glasses, Goat, Gore, Group, Handjob, Hermaphrodite, Horror, Humiliation, Incest, Insanity, Licking, Lizard, M/F, M/M, Macro, Master/Slave, Masturbation, Mature, Micro, Mind Control, Molesting, NSFW, Nudity, Orgasm, Parody, Pedophilia, Plushophilia, Public, Rape, Relationships, Revenge, Romance, Rule 34, Satire, Scalie, Semi Consensual, Sex, Shrinking, Size Difference, Snuggles, Suicide, Teasing, Threesome, Torture, Transformation, Transgender, Unbirthing, Underage, Undertail, Undertale, Violence, Vore (soft), Voyeurism, giantess, moaning, murder, screaming, smut, sucking

The Woodfather - Growth

Curiously, the synergists can control how quickly and they absorb their prey with heavy mental deterioration displayed in prey that have not been fully absorbed for over an hour. wfvs3-0006, leto hammond and gregory deans.

Cock, Cock Growth, Cock Vore, Cum, M/M, Multi-Cock, Muscle Growth, Muscle Worship, Muscles, Stag, Transformation, merging

Giantess Lammy X Parappa: Big-Step-Sisterly Fuckery

"i can almost feel myself mentally deteriorating from the inside out, and it is a feeling that is simply nothing short of marvelous!"

Abuse, Age Difference, Balls, Bestiality, Blood, Blowjob, Blush, Bondage, Boobs, Brain fucking, Brainfucking, Bukkake, Canine, Cat, Chains, Creampie, Crossover, Cuddling, Diarrhea, Dog, Doggystyle, Drowning, Drunken Fun, Ear Fetish, Earwax, Endosomatophilia, Erection, F/F, Fanfiction, Fear, Feline, Fellatio, Foot Fetish, Footjob, Foreskin, Foursome, Fucking, Genital Vore, Gore, Guitar, Handjob, Hentai, Hermaphrodite, Humiliation, Incest, Insanity, Interspecies, Lamb, Lesbian, M/F, MILF, Macro, Magic, Male/Female, Masturbation, Mature, Medical Procedures, Micro, Mind Control, Mucus, Muscle, NSFW, Naked, Naughty, Orgy, Penetration, Penis, Possession, Punishment, Pussy, Rape, Romance, Rule 34, S&M, Scalie, Seduction, Series, Shrinking, Size Difference, Teasing, Tentacles, Tit Fuck, Tongue, Torture, Trouble, Um jammer lammy, Unbirthing, Unconsciousness, Underage, Undertail, Undertale, Vagina, Video Games, Violence, Virgin, Voyeurism, WTF, caught, chainsaw, deepthroating, furry, giantess, gross, murder, nose, parappa the rapper, surgery, vore

The Art of Self Control

mental deterioration, increased hormonal production, suppression of fear and self preservation instinct. and that's just from the scent. it's pretty incredible, really." she shuddered again and reached a hand down between her legs.

Accelerated Pregnancy, Alien, Anthro, Bestiality, Birth, Breeding, Bukkake, Canine, Chemical Use, Death of personality, Degradation, Desperation, Domination, Downward Spiral, Drugs, Egg Laying, Eggs, Ejaculation, F/F, Fear, Female, Feral, Filthy, Forced, Forced Feeding, Genetic manipulation, Group Sex, Heterosexual, Heterosexual sex, Human, Humiliation, Hybrid, Impregnation, Inflation, Insanity, Larva, Loss of self, Lust, M/F, Male, Masturbation, Mental Degradation, Messy, Mind Control, Misery, Mud, Oral Sex, Orgasm Denial, Oviposition, Pain, Pregnancy, Rape, Rebirth, Sci-Fi, Size Difference, Slime, Swallowing, Tentacles, Transformation, Vaginal Prolapse, Vaginal Sex, Violence, addiction, broken, genetic engineering, happy ending, infection, infestation, larvae, mindfuck, paralysis, parasite, scent marking, semen, shameless

Arcadia: Collected

Finn couldn't imagine the sort of paranoia that one had to have to protect their key especially when you were constantly fighting against the mentally deteriorating powers of the haze and your own primal urges as a transformed beast.

Cum, Gay, Gay Relationships, Human, M/M, Messy, Mind Control, Muscle Growth, Muscles, Musk, Oral, Otter, Plot Development, Post-Apocalyptic, Rhino, Story Series, Transformation