A man is walking home late at night when he sees a woman in the shadows.
“Twenty bucks, “she says. He’s never been with a hooker before, but he decides what the hell…
They’re going at it for a couple minutes 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. “
This joke is included in the Black Book of Jokes. You can order it from here.