There were three women who always hung their laundry out in the backyard. Two of the women noticed Sophie never had her laundry out on days that it rained.
One day, they were all out in the backyard putting their clothes on the line when one of the women said to Sophie, "How come when it rains, your laundry is never out?"
"Well," said Sophie, "when I wake up in the morning, I look over at Paul. If his penis is hanging over his right leg, I know I can hang out the wash. If his penis is hanging over his left leg, I know it's going to rain, so I don't hang out the wash."
"What if it is pointed straight up?" asked one of the women.
"On a day like that, I don't bother with the laundry."