It only took that bit of curiosity for the bull to win out. Ben found himself snuffling the female's slick opening, the powerful odors causing the animal instincts to spike. He twisted clumsily, having to raise his bulk over the female's rump, then shifted forward as his massive erect shaft prodded and missed, prodded and missed, and then...
Oddly, the blast of pleasure Ben expected never materialized. There was pleasure to be sure, but what really filled his mind was a sense of accomplishment, a deep satisfaction in performing his role in life. This was what he existed for. He ate, he slept, he defecated and urinated, all supporting roles for his only real purpose. Mating. The realization was so primal, so basic, that Ben accepted it without question even as he knew his mind was closing down, simplifying with each thrust. He knew he should be terrified, but as he built to a shuddering ejaculation, the animal mindset was enticing. No fear, no worry. Eat. Sleep. Shit. Fuck. His future boiled down to four words. Then he came, and even the words were gone, and Ben the Herd Sire Bull bellowed along with his mate.