There was a married couple who, as a private joke, began referring to having sex as "doing the laundry".
One evening, they were watching television and the husband asked his wife, "Do you feel like doing some laundry tonight?"
"I would," replied his wife, "but I'm not feeling very well. I have a bit of a headache."
"That's all right. I understand," replied the husband.
About thirty minutes later, the husband heads up to bed. The wife follows him about thirty minutes later, finds him reading in bed, and says, "I'm feeling much better now. Would you still like to do some laundry?"
"Nah, that's okay," replied the husband. "It was only a small load, so I did it by hand."