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sex was supposed to be fun, humans would have died out long ago if it wasn't. but animals had heat cycles, meaning there was a need for it. why would they need a cycle if it was fun to do?

Bestiality, Canine, Collie, Deep Penetration, Heat, Human, Husky, M/F, Oral, Vaginal

Escaping The Heat

Probably hasn't been fucked in weeks!" _actually, it was months._ end _never_ in heat!

Alcohol, Anal, BBW, Breeding, Chubby, Dog, Gangbang, Heat, Horse, Impregnation, M/M/F, Orgy, Pig, Pseudo-Rape/NC, Reluctant, Rottweiler, Wolf, sow

Shared Heat

Daisy felt a powerful urge to close the distance between them, to press her body against his and lose herself in his embrace. her heat cycle screamed at her to act, to claim this strong, handsome male as her mate.

Aroused, Athletic, Bareback, Blowjob, Boomer grandma, Breeding, Bulge, Consensual, Creampie, Cuddling, Cumming, Deep Throat, Erection, First Person, First Time, Hare, Heat, Heterosexual, Interspecies, Lagomorph, M/F, Missionary, Mouse, Muscles, Orgasm, Pheromones, Pregnancy Risk, Rat, Relationships, Risk of Pregnancy, Rodent, Romance, Size Difference, Strangers to lovers, Submissive, Vanilla, Virgin

Heat And Heat

That...it's...when a pokémon doesn't have sex routinely, they can go into some kind of cycle where they get...really horny, and basically start giving off signals that are almost begging for someone to fuck them.

Arcanine, Gender Shifting, Heat, Human, M/other, Non-Consensual, Pokemon, Pokemorph, Rape, Rough Sex, Size Difference, Thermophilia, ditto

[c] Leafeon's New Mate!

But a pokerus-induced mating heat was nothing to sneeze at, and fir had mounted her again after dinner, and one more time just before bed.

Breeding, Cum Inflation, Eevee, Gender Shifting, Gender Transformation, Inflation, Pokemon, Pregnancy, Pussy, Transformation, leafeon

Cycles: Growth

He let out another long moan as the buff dog above him gripped his leaking cock and began to paw him off as he continued to press and rub his throbbing tip against the bitch in heat.

Bad Language, Cock Growth, Cum, Fox, German Shepherd, Impregnation, Lion, M/M, Malamute, Male Pregnancy, Rough Sex, Tie, Wolf, Yiffy

The Cycle

# the cycle someone was parked in the apartment's assigned parking spot when tricia came home. it wasn't her mother's car; her mother didn't own one, couldn't afford one.

Alcohol, Bareback, Drunk, Feline, Female, Hybrid, Male, Panther, Rabbit, Rat, Rodent, Sex, Straight, Teen, Virgin

Room/mate

The bunny was in heat. for a moment they were both frozen, caught entirely off guard, then ashe lashed frantically out with one leg.

Biting, Blood, Canine, Creampie, Cunnilingus, Domination/Submission, Dubcon, Dubious consent, FTM, Fear, Forced, Forced Orgasm, Forced Sex, Fox, Heat, Humiliation, Knot, Knotting, Lapine, Male, NC, Oral, Predator/Prey, Rabbit, Rape, Rough, Rough Sex, Shower, Size Difference, Transgender, Vaginal, Violence, brat

Chapter Two

_"saphira... are you in heat?" _ byzil questioned noticing the gooey liquid on the grass.

Dragon, Fanfiction, Inheritance Cycle, Lesbian, Mating, NSFW, Romance, Saphira, Scalie, Sex, Yiff, byzil

If You Can't Stand The Heat, Get Outta The Kitten.

For the most part, nala was fairly illusive when it came to her heat cycle, usually opting to sneak away with simba for several days and nights until it passed, yet here she was, in plain view of him, clearly displaying how sexually receptive she was.

Anal, Disney, Heat, Kiara, Kovu, Lion King, Lioness, M/F, Mating, Nala, Non-Anthro, Oral, Vaginal

Heat

Tommy asked what the cycle was and why boys didn't have it, and dr. mauro's face turned red and he refused to answer the question, although dr. redfield made a quip about boys "being in heat all the time."

Anthro, Canine, Cuddling, Feline, Handjob, Heat, Humping, Incest, M/F, M/M, Teenagers, Vaginal, Voyeurism, Vulpine

Handling Spring Heat

They were moving on pure instinct, driven by a heat cycle that realis couldn't contain, and rashidi couldn't resist.

Brother, Cum, Feline, Fucking, Heat, Herm, Hermaphrodite, Impregnation, Incest, Lion, Lioness, Multiple Orgasms, Oral, Penetration, Pregnancy risk, Sex, Siblings, Sister, Vaginal, cum inside, estrus, h/h