A man is having problems with his thing which certainly had seen better times... He consults a doctor which, after a couple of tests, says, "Sorry, but you've overdone it the last 30 years, your thing is burned out; you won't be able to make love more than 30 times!" The man walks home (deeply depressed); his wife is already expecting him at the front door and asks him what the doctor said. He tells her what the doc told him. She says: "Oh my god, only 30 times! We should not waste that; we should make a list!" He replies, "Yes, Ii already made a list on the way home; sorry but your name is not on it!"