The smells and new sensations urged David to walk toward the jenny and take a closer look.
Twisting his head, he stood a few feet behind the jenny, oggling with one eye and then the other, trying to become accustom to seeing things as do equines.
Sniffing at the musky scents protruding from those black, winking lips of donkey sex, David knew down deep this was totally improper and plain wrong!
He thought to scream for help, cry to Henry, plead for release, but at the same time his instincts were urging him to enjoy life.
The thoughts of finding enjoyment as a stud and animal, having sex, mating, and finding pleasures from being a true beast, all seemed perfectly prim and proper.
Worse yet, with smelling the musky scent of a jenny in heat, David began to feel his new self becoming erect where it would count, that is if he did actually mate with the jenny.
Part of his twisted mind felt the growing erection building a monster cock, granting him his one special joy of being an animal.
The other part of his thinking thought of the coming delight and ultimate satisfaction he would have from mounting, humping, and doing it to a jenny.
David swung his tail, whipping it and slapping the new appendage about his big hairy rump.
Anxious seconds passed, his donkey big cock becoming extended, erect, and telling the brain it was standing ready to function as his most sensual thing of delight.
Anxiety was also showing as David knew he would have a slim chance to become his ole' self if he abstained from mating as would the animal. His memories of Henry's words suggested if he could stop his mating urge he might force the man to return him to being a man too; well he hoped it would happen!
The Jenny seeing her stud having second thoughts, took a half step backward, and with a squirt of urine, doused David's nostrils in her lusty scent.
As his nose dripped of jenny urine, David's human mind seemed to explode. He screamed a rank bray, leaped upright, cock then out straight and rigidly hard.
Shaking his head to rid his nose of the female animal's urine, David stepped ever closer to the waiting jenny.
Braying then wildly, in the distance David heard the rise of laughter, it was again Henry standing by the stall door, he watching, and enjoying to see David poised and ready to begin his employment.
Uneasy standing then upright, David took a forward stumbling step.
A braying scream echoed the stall, as one grown and then matured Donkey stud fell forward, ramming in, and jamming full the jenny with his very swelled and big cock.
Stella screamed her sudden pain and turned to making soft sensual sounds as David took to instinctive movements. Humping as if he were taught by some of the best stud donkeys, David worked his maleness in and deep into Stella, and her hot body.
"I told you David, you'll come to see I'm doing you a major favor!" Henry chided his new prime stud, knowing that for many years to come this young male would excel and enjoy his way of life and livelihood.