Fanatic Xenophile, Part Two
Electric feeling was only getting stronger, the faster pace and her obvious enjoyment wearing on his resistances and urging him to pick up the pace, to rut her, his instincts no longer caring how far outside his species he was if it meant sating that atavistic
Crossing Genera
I wonder if the atavistic rods his ancestors were given included the penile bone. he thrusts into me, shaking the mattress and causing it to jump briefly off the narrow floor.
Living and Mind Control 1
When the deviation index of someone from the greater species got too high, they underwent an atavistic devolution that affected everyone in a different way.
Call of the Moon -- chapter 3
The moment simplified profoundly as she let go of her learned, human fear and sank with atavistic inevitability into the fact that he was very willing, and very ready, to mate with her.
Faux Fur
It descended into atavistic whining and yowling as the curse's momentum carried it across the finish line. stunned, sabrina looked down at the coat in her hands. it did feel... weird. she'd never felt a real fur coat, though.
I, Dacien -- Chapter 35 -- CONJUNCTION
Salt-scent flooding his senses, xavien stared out at the apparently endless expanse of water and repressed an atavistic shudder.
Aleaster & James at the Temple of Grippli
It felt harder and harder to focus as he swam on the waves of atavistic reptilian bliss, bubbling up along his brain stem from the murky depths of his ancestral, primal urges.
Die Fast
The younger male was heaving, panting for breath, tongue lolling atavistically out of his mouth. the hound recoiled slightly at that, and then more so when his eyes gave the mutt a once-over.
In This Class, You Get Transformed-- DIRTY
He had gone atavistic, like others before him. she walked up and took his head, "come on, lion. let's sit you down." frank obeyed his professor. she brought him back over to his desk, picked up his chair, and sat him down.
Technofox 1
She shuddered and went atavistic; barked and yelped as loudly as the muzzle let her. she knew what was coming; he shifted his weight, and he picked up the pace.
What Happens In The Woods...
He smelled atavistic and primal. he smelled like ideas, not things: like lust, and need, and horniness.
Ideal Breeding Stock
It hurt her _mind_ as her neurons remapped to the concept of six limbs, perhaps tapping into some primordial insectoid ancestor’s atavistic genes to do so, but soon, she was moving her arms as they grew out, aching bone by aching bone.