A farmer had 5 female pigs and, since times were tough, he decided to take them to the county fair and sell them. While at the fair, he met another farmer who owned 5 male pigs. After talking, they decided to mate the pigs and split everything 50/50. They lived 60 miles away from each other, so they agreed to drive thiry miles and find a field in which to mate the pigs. The first morning, the farmer with the female pigs got up at 5 a.m., loaded the pigs in the family station wagon (which was the only vehicle they had) and drove the 30 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, they're pregnant. If they're rolling in the mud, they're not." The next morning they were rolling in the mud, so he hosed them off, called the other farmer, loaded them in the station wagon and proceeded to try again. The following morning, in the mud again! The next morning, in the mud again! This continued all week until the farmer was so tired 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." His wife looked out the window and yelled back, "Neither, they're in the station wagon and one of them is honking the horn."