"Back off!" Jon yelled, though he knew all any human would hear would be a string of panicked horse noises.
Buck slid to a standstill, his male member dangling beneath him, Jon glanced at it and immediately a tingling sensation erupted around his flank. This worried him even more "Dammit, I hope that doesn't mean what I think it does...", thought he knew it did.
Buck started slowly advancing again, circling around Jon.
Jon circled on the spot, keeping her rear as far from Buck as possible.
"Who the hell do you think you are!?"
"I am so horny!" Yelled Buck "I can't damned control it. What is going on?"
"Wait, aren't you an actual horse?" Jon asked.
"No, I was asleep in my bed, and then I woke up in this field. And when I saw you, this, this thing just shot out and I got so horny. I'm really struggling here!"
"I was Jon, before I woke up here, you?"
"God! Jon! It's me! Karyn!"