What was something you would never consider doing is now the thing you want most. Prancing about like a stallion only as a pony you show off what style one thinks the expectant mare would like to see.
Tail held high it flicks quickly in snapping fashions suggesting maybe your highly alert abilities. Each leg rises and slams down tossing dirt into the air making a cloud of dust roll up behind you.
Your pony cock is half out and soft it jiggles with every harsh step driving home the wild naked sensation of being an animal. Those larger balls ache for their ultimate delivery of you load of semen. Drips of white cum flick off the flat end as your pony penis cock grows longer and thicker with every prancing step.
Snorting and drawing quick deep breathes the mannerisms of what it is to be a stallion are now surfacing. You are driven by the scents of her female sex and the squirt of urine she let loose. In your hairy pony head sets yet a brain originally born as human but now decreased in size. Even if it be smaller the brain has within it the learned memories of what you were and they send suggestions telling you what you soon to do will wipe clear any and all rememberance of what you were as a human.
Standing just inches from her winking vulva your nostrils draging in a breath of air tantilized by the wafting scent of the mare.
You want this so damn much now nothing of what your human conscience was yelling matters. As he scent is thick so is the brown juices ozzing out her sex and making her entire rear glisten.
Its as if your desire is running you and not yours the ability to chose of your own free will. Your tongue peers out past thickened black lips and feeler hairs to search at the glistening juices of the mare's sex. A slow and drenching lick of her rump, and vulva makes the mare shiver with her sexual delight.
As your tongue returns tasting her juices the realization of just how deep you have fallen prey to Doctor Thule's serums peaks past those new bestial instincts for procreation.
"No, yes, I want it!" you think as for an instant you stand there cock errect and steel rod hard. Your every muscle is at full ready and tensed for either mating or running away if the need of self preservation is needed.
Breathing is now faster as the urge is one that can not be denied.
Lust, equine passion, the onset of Doctor Thule's serums, you can not tell and right then just don't give a ..... care. She is ready, your are wanting, the moment is now and all that is for you a pony stallion stands ready.
It is a simple jump and push upward as musles which were tensed lifts the bulk of this new you with wild and wondered ease. Your front legs are set atop her lovely round rear and with a half step forward the legs saddle down her flanks.
The new sensations are being driven and backed by strange mental suggestions as to what your body need do next. Memories of watching animals and even horses doing what comes natual are still alive and in your quick memory. Yet now there be some new instincts bred into you through the serums of the Doctor. You know what is desired, you feel what is so right, your brain is telling you what to expect, and it is time.