Jeff hadn't been there long when two things caught his attention - a wonderful scent, and the man and horse walking toward his pen. The horse had its tail wrapped up and was prancing and sniffing in his direction. The man was grinning as he opened the gate and let the horse in the small pen.
"There ya' go, fella! Time to make another foal."
He realized that the wonderful smell was coming from the mare - and his horse cock was already dropping. He sniffed the air, using his upper lip to trap the aroma in his flaring nostrils. He snorted, then pranced around her. It was strange going through this equine ritual, but his horse memories told him exactly what to do to court this mare properly.
After a lot of false starts and small kicks from the mare, Jeff was starting to feel frustrated. His cock was erect and swinging and he desperately needed sexual release. How long had it been? He only had an hour - it would be terrible to miss this chance.
Happily, the mare finally presented herself to him, this time cooperating as he slid over her rump and prodded her with his shaft. Too low. Too high. And then...
Jeff thrust deep into the mare, and they both whinnied in raw pleasure. Mating instincts took control, and Jeff was completely and utterly a stallion in mind, body, and soul. Pressure built in his balls, which felt like they had swollen to the size of melons.
And then he felt something change. A small corner of the animal mind became Jeff again, and he knew the hour was up. No! Not now! Not yet! He could feel himself building to climax. Please, no! He wanted to stay here, to finish! The computer program was trying to bring him back - he could feel it pulling at his mind and body even through the powerful sex.
NO! With all the willpower of a determined stallion to back him up, Jeff resisted the pull. And in the middle of that effort, he came with a blinding climax. His horse cock spewed a gallon of cum, and all he could think about was the mare and mating.
The computer noted the resistance and changed its parameters to comply...