A few years ago, I was watching David Letterman, and he was broadcasting his show from Las Vegas. He was doing his opening monologue and he told this joke.
He said that he was standing in front of one of the casinos, and a man came up to him looking desperate.
"Please!" the man begged frantically. "Could you possibly spare $500. My wife is very sick, and I really need the money to take her to the doctor and to buy her the medicine she needs."
Dave looked at the guy suspiciously, and he asked the man, "Wait a minute! If I
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