A man is about to get into the shower as his wife finishes hers. The doorbell rings. The wife quickly wraps herself in a towel and runs downstairs. She opens the door to find Bob, the next-door neighbor.
Before she can speak, Bob says, "I'll give you $800 to drop that towel."
After a moment's thought, the woman drops her towel and stands naked before him. Bob hands her $800 and leaves. She wraps the towel around herself again and goes back upstairs.
Her husband, still in the bathroom, asks, "Who was that?"
"It was Bob, the next-door neighbor," she replies.
"Great!" the husband says. "Did he say anything about the $800 he owes me?"