Joke: An elderly couple goes to a fast food place where they carefully split a burger and fries. A man takes pity on them and offers to buy the wife her own meal. ''It's all right,'' says the husband. ''We share everything.'' A few minutes later, the guy notices that the wife hasn't taken a bite. ''I really wouldn't mind buying your wife her own meal,'' he offers again. ''She'll eat,'' the husband assures him. ''We share everything.'' Unconvinced, the guy asks the wife, ''Why aren't you eating?'' The wife snaps back, ''Because I'm waiting for the teeth!''