When Sam returned to the house one evening, his wife Sarah announced that the new cleaning woman they had hired had stolen two towels.

"Yeah," said Sam very disinterested, and reclining on the sofa, "that wasn't very nice of her to do."

"You're darn right it wasn't," Sarah said. "And they were the two best towels we had... the ones we got from the Hilton Hotel while we were on vacation."