Peter, a local farmer decided that he wanted to breed pigs, so he bought several. Quite a while passed and he saw that the pigs weren't getting pregnant, so he called a veterinarian friend for advice. The vet suggested that he try artificial insemination. The farmer had no idea of what that was, but not wanting to appear ignorant he asked only how he'd know when the pigs got pregnant. The vet replied that "Instead of just standing around, they'll be rolling in the mud."
Well, after quite a bit of thought, the farmer decided that what was meant was that he had to impregnate the pigs himself. So, next morning he loads them all into his truck, drives out into the woods, and in the course of the day has sex with the whole bunch. He goes to sleep that night, exhausted, and when he gets up the next morning to check he sees that the pigs are still just standing around. Again he loads them all into the truck, drives into the woods, and repeats his efforts.
The next morning he's still so exhausted that he can't get up, so he asks his wife to go check on the pigs. When she gets back he asks "Are the pigs rolling around in the mud?". She answers "No, they're all in the truck, and one of them is honking the horn!"
