A farmer had 50 female pigs and wanted them all pregnant. His friend told him to screw them himself. If in the morning they were rolling in the hay, they weren't pregnant, but if they were rolling in the mud, they were. The farmer decides this is a good idea, and that night he loads all the pigs into his truck, takes them into the woods, and screws them all.

The next morning, he looks out the window and sees all the pigs rolling in the hay. He's really frustrated, but decides to give it one more shot. So that night he takes all the pigs to the woods and screws them again. The next morning, he looks out the window, and all the pigs are rolling in the hay. He's really tired, but thinks he'll try one more time. That night he takes all the pigs out and screws them yet again.

The next morning, he's too tired to look out the window, so he tells his wife to tell him if the pigs are rolling in the mud or the hay. She goes to the window and tells him he better look for himself. The farmer goes to the window and sees all the pigs in the truck honking the horn and waiting for him.