Farmer Brown & his Pigs

Farmer Brown buys twelve pigs at an auction, only to discover that they are all female. He immediately calls Farmer Jones to ask if he can bring them over to mate with his male pigs. "Sure", says Farmer Jones.

Farmer Brown loads his twelve pigs into the truck. When they get to the Jones farm, the pigs jump out and spend the day mating with the males. Before he leaves, Farmer Brown says, "By the way, I've never had pigs before. How will I know if they're pregnant?"

"Well," says Farmer Jones, "look for signs of unusual behavior. That's usually how you know."

The next morning, Farmer Brown looks out his window and sees nothing unusual. So he loads the pigs up and brings them to the Jones' farm again. The following morning, the pigs are still behaving normally, so, once again, he takes them to the Jones' farm. The next morning, he feels too discouraged to look out the window. "Honey," he says to his wife, "would you mind telling me if our pigs are doing anything unusual?"

Well, she says, "eleven of them are in the back of the truck and the twelfth one's blowing the horn."