A farmer had five female pigs and, as times were tough, he had determined to take them to the county fair and sell them. While at the fair he met another farmer who owned five male pigs. After talking a bit, they decided to mate the pigs and split everything 50/50. Now the farmers lived sixty miles away from one another, so they each agreed to drive thirty miles and find a field in which to mate their pigs. The first morning, the farmer with the female pigs got up at 5a.m., loaded the pigs into the family station wagon (which was the only vehicle they had) and drove the thirty miles. While the pigs were mating, he asked the other farmer, "How will I know if they are pregnant?" The other farmer replied, "If they're in the grass grazing in the morning, then they're pregnant, but if they're rolling in the mud, then they're not." The next morning they were rolling in the mud, so he hosed them off, called the other farmer, loaded them again into the family station wagon and proceeded to try again. The following morning, in the mud again! And the next morning, MUD again! This continued all week until the farmer was so tired that he couldn't get out of bed. He called to his wife, "Honey, please look outside and tell me if the pigs are in the mud or in the field grazing." The wife looked out the window and then yelled back, "Neither, they're in the station wagon and one of them is honking the horn."