After spending the night at a hotel with a prostitute, a politician takes three $100 bills out of his wallet and places them on the dresser.

“Thanks,” says the hooker, “but I only charge 20 bucks.”

“Twenty bucks for the whole night?” the politician yelps. “There’s no way you can make a living on that.”

“Oh, don’t worry,” replies the prostitute. “I do a little blackmail on the side.”