After spending a night at a hotel with a prostitute, the politician took $300 out of his wallet and placed it on the

　　dressing table.

　　"Thanks," she said. "But I only charge $20."

　　"Twenty bucks for the entire night?" the amazed politician replied...

　　"You can't make a living on that."

　　"Oh, don't worry," the girl replied. "I do a little blackmail on the side!"