A man's walking home late at night when he sees a woman in the shadows. "Twenty bucks, " she says. He'd never been with a hooker before, but he decides what the hell it's only twenty bucks.

They're going at it for a minute when all of a sudden a light flashes on them it's a police officer. "What's going on here, people?" asks the officer. "I'm making love to my wife, " the man answers indignantly.

"Oh, I'm sorry, " says the cop, "I didn't know." "Well, " said the man, "neither did I until you shined that light in her face."