This Little Piggy
A farmer had just bought some pigs for breeding, but didn't quite know how to do it. He soon found out that the vet would charge him $200 a pig.
That was a little rich for his blood, so he figured he might be able to do it himself. So for three weeks, he'd load up all the pigs in the truck and take 'em to an isolated location where nobody would see him doing it.
After three weeks, none of the pigs were pregnant, so he decided to forget about it for a morning. That morning, his wife happened to look out the window.
"Honey? What are you doing to those pigs?"
"What do you mean?" asked the farmer.
"One's honking the horn, and the others are rocking the back of the truck."