with a whore

Paddy was walking home late at night and sees a woman in the shadows
"Twenty quid . . ." she whispers.
He'd never been with a hooker before, but he decides what the heck, it's only twenty quid.
So they hide in the bushes. They're going "at it" for a couple of 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," Paddy answers indignantly.
"Oh, I'm sorry," says the cop, "I didn't know."
"Well," Paddy says, "neither did I, until you shined that light in her face."

;-)