SWAT Kats: Joining a Pride, Ch 23
That is the biological imperative ten told you about. however, it isn't one sided. the one chosen also feels this need, except for non-lions who may mistake it for simple attraction. that is where the hunt comes in.
Dragon Fertility
Her brain was flooded with dopamine as a reward for fulfilling her biological imperative to breed. but before she could relax on top of her massive belly she felt something start to shift and pulsate inside her.
A Good Substitution
Hope you enjoy watching someone’s biological imperatives getting utterly scrambled!
Commission: Puberty's A Bitch
Driven feral with lust, the little cum-pumping mouse trapped under her was lost in the sensations, busy fulfilling his biological imperative as well as her orders to breed her.
55 Days
“it's not an _urge_, corymb—it's a biological imperative. they don't know what they're doing. it almost makes it worse. we call it fuguing, since no one recalls it after the fact. fugues have no agency; their only fault is being near someone with ardeo.
Emotional Weight
This new, improved one took it as a promise and rode as hard as her chubby body would allow, bouncing on that shaft with wild abandon, flamboyant rainbow locks crowning an expression of pure pleasure, forgetting about everything but that deep-set biological imperative
Briarheart: Endurance Training
‘it’s a biological imperative,’ rich said, ‘don’t blame me for the way that my ancestors evolved.’ ‘i’m not,’ said vex as she tried to get the sticky cum out of her fur, ‘i like it too.’
Lucario x Zoroark
There was some biological imperative, he felt, that demanded his knot slip inside of zoroark's ass. there were some soft cries of discomfort as lucario began to knot zoroark, but he could hardly hear them over the rushing sound in his head.
Stray Thoughts
Still, filling caleb with kitty cream was a way for the newly minted feline to sow his wild oats and help fulfill the biological imperative far too complex for them to put words to. "careful, caleb, there're no rematches.
Tangled Vines - Chapter 11
No law or decree could overcome the biological imperative of the mûr tua'ansa mating drive. among these people, there was no concept of divorce, or of multiple joinings.
A Visit to the Doctor 2 - Another Visit (Illustrated by Menagerie)
One might suspect that some biological imperative led to a more harmonious integration, their linked biology gingerly influencing their thoughts on the matter.
Love Lost, Chapter 13b: Phobias, concluded.
"of course; a downside of owning property with biological imperatives." simon looked around at the mess and lifted his left leg, comparing the outline of his foot to the largest patch of drying blood. "she's done worse.