A man was sitting at the breakfast table, reading the news paper, when his wife came up and smacked him along side the head. "What was that for?" he says. She said," That's for being a lousy lover." She walks away. The man thinks on this and goes looking for his wife. He finds her getting ready to take a shower, he smacks her on the rump with his paper. She asks,"What was that for?" "For knowing the difference!"