Jeff was exhausted from the extraction of semen that had just occurred. His head horse cock went limp and flopped against his leg. A little bit of off white horse cum dripped out of the tip. Totally spent, Jeff decided to take a nap.
After about a few hours his mother woke him up. Jeff slowly awakened. The first thing he noticed was a strong throbbing sensation in his cock. Jeff looked and saw that he was tenting his blanket out about 2 feet, and he was incredibly horny.
"Jeff, wake up! We got another order for semen, but this one is going to take a little extra work. Your semen didn't take last time so the farmer wants you to impregnate the mare with 'fresher' semen".
"Huh?" Jeff asked confused. "Do you mean that he wants me to have sex with his mare?!". "Yes honey, and he will pay you a lot of money!"
"Uggh", Jeff thought. He was absolutely disgusted by even just the thought of it. By his horse cock said otherwise. It was now straining harder than it had ever been before. Even just the blanket touching thr sensitive head was almost too much for Jeff.
His mother, seeing his throbbing erection, says "come on, I can see you want too! You can take care of that erection of yours!"... Jeff shuddered as he reluctantly grabbed his coat.