Pigs
A farmer had five female pigs. Times were hard, so he decided to
take them to the county fair and sell them.
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.
The farmers lived sixty miles apart. So they agreed to drive
thirty miles each, and find a field in which to let the pigs mate
The first morning, the farmer with the female pigs got up at 5
a.m., loaded the pigs into the family station wagon, which was the
only
vehicle he 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 in the morning,
they're pregnant if they're in the mud, they're not."
The next morning the pigs were rolling in the mud. So he hosed
them off,
loaded them into the family station wagon again and proceeded to
try again. This continued each morning for more than a week.
One morning the farmer was so tired, he couldn't get out of
bed. He
called to his wife, "Honey, please look outside and tell me
whether the
pigs are in the mud or in the grass."
"Neither," yelled his wife, "they're in the station wagon and one
of them is honking the horn."