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Primal Instincts

There was a primal instinct inside of him to breed ravuul again and again to show the whole tribe that this lizard belonged to him and him alone.

Eggs, First Time, Heat, Impregnation, Lizard, Lizardman, Mating, Transgender, Transman, mpreg

Following Their Instincts

To be fair, jenna herself was able to stay under control while in the presence of a virile stud, even with her instincts _screaming_ at her to let him breed her.

Adult, Anal, Ass, Balls, Balto, Belly, Bisexual, Bulge, Butt, Cheating, Cock, Cuddling, Cum, Cum Inflation, Cumming, Deep Penetration, Deep Thrust, Dick, Dog, Doggystyle, Dusty, Erection, Exhibitionism, Explicit, Female, Fucking, Heat, Husky, Hybrid, Hyper, Hyperphallic, Impregnation, Incest, Inflation, Jenna, Knot, Kodi, Light Nudity, M/F, M/M, Malamute, Male, Male/Female, Male/Male, Masturbation, Mating, Mild NC, Non-Consensual, Nudity, Oral, Penis, Precum, Pregnancy, Pregnant, Pseudo-Rape/NC, Pussy, Rimjob, Rimming, Seed, Sex, Sheath, Size Difference, Spooge, Tailhole, Tie, Tied, Vaginal, Wolf, Wolf Dog, steele

Maternal Instincts

As much as he wanted to tell her that they needed to move and get somewhere private he couldn't, instincts told him to nurse, let his 'mother' clean him.

Birth, Breeding, Canine, Cum Inflation, Cunnilingus, Female Ejaculation, Femdom, Fisting, Fox, Heat, Hyper Inflation, Impregnation, Inflation, Kitsune, Labor, Lactation, Living Insertion, M/F, Massage, Masturbation, Mild Exhibitionism, Multiple penises, Oral, Romance, Semi-Public, Short Story, Size Difference, Unbirthing, Vore, Vore (soft), Wolf, Wolfess, estrus, hormones, hyper cum, unbirth, “Birthing”

Tribal Instinct

His head popped off his cock as he fell onto his back, his discipline out the window, sexual urge and instinct taking complete control of him.

Autofellatio, Avian, Cumshot, Horse, Hyperphallic, M/M, M/solo

Intimidating Instincts

Rebecca wiped the sweat off her pale forehead and threw back dangling threads of her vivid purple hair back. She sighed as she sat back against an uncomfortable chair and looked towards the computer screen. She was writing a research paper on the...

Human, M/F, NSFW, Pokemon, Pokephilia, Size Difference, Tyranitar

Renewed Instincts

Romulus asked with a quiet grunt, his hips continuing to give instinctive little thrusts entirely beyond his control.

Aphrodisiac, Aroused, Bondage, Breeding, Canid, Canine, Collar, Cuffs, Cum, Cumming, Cumshot, Cunnilingus, Deep Penetration, Ejaculation, Female, Fondling, Forced, Forced Sex, Fox, Handjob, Heterosexual, Humping, Leash, Light Bondage, M/F, Male, Masturbation, Mate, Medical Procedures, Milking, Mounting, N/C, NC, Non-Consensual, Nude, Oral, Orgasm, Penetration, Pheromones, Punishment, Restrain, Rough, Science, Semi NC, Short Story, Story Series, Straight, Tie, Toys, Vixen, Vulpine, Wolf, Yiff

Submitting to instinct.

His instincts kicked in and his hips slammed back and forth hurridly his balls slapping against her pussy almost teasingly.

Anal, Dog, F/dog, First Time, Human, Knot, M/F

Shackled Instinct

And as such those who became afflicted in their prime of youth could be very, very persuasive to the baser instincts of man. all too often that was their trump card.

Female, Interspecies, Male, Undead, Vaginal, Vampire

A Matter of Instinct

Her new body is not without its perks, and the accompanying instincts make adjusting to life as a 'pokemon' a breeze. until a tall, strange pokemon strides into her life and sets her instincts afire like never before. "stop, articuno!

Absol, Charmander, Eevee, Impregnation, Knotting, Lactation, PMD, Pokemon, Pregnancy, Pregnant

Feral Instinct

instinct drives the world, even our complex human minds are drawn by an incessant undercurrent of instinct. in this, our hero has long forgotten how to be a person and when the instinct rises he has no qualms about satisfying his needs.

Birth, Blood, Human, Humiliation, Impregnation, Insanity, M/F, Rape, Shark, Snuff, Transformation, Violence, Vore (hard), imprisonment, isolation, vore

Trust and Instinct

"don't worry son, just trust your instincts!" his voice distorted until nothing intelligible could be made from it, just loud grunts and groans.

Age Difference, Anal, Ape, Character Development, Cock Growth, Cub, Dragonball Z, Father, Father and Son, Foot Fetish, Footjob, Gay, Gohan, Great Ape, Human to anthro, Incest, Loud sex, Love, M/M, Male, Male/Male, Mammal, Muscle Growth, Musk, Night, Oozaru, Romance, Rough, Rough Fucking, Rule34, Size Difference, Son, Thick penis, Transformation, Uncut, Young, animalistic, big penis, cum in ass, dirty talking, dragon ball, fanfic, goku, moonlight

Pack Instinct

Pack instinct took a course for the worst as he watched, with complete horror, the two dogs step over his body in unison, squishing themselves against one another as they fought over pushing in the deepest, the tips of their huge, pointed cocks both easily

Arcanine, Deep Penetration, Double-Penetration, Gang-Rape, Hyena, Hyperphallic, M/M, M/M/M, Pokemon, Spooge, Watersports, Zoophilia