S & M
Sue and Sally met at their 30th class reunion, and they hadn't seen each other since graduation. They began to talk and started to bring each other up to date on their lives. The conversation covered their husbands, their children, homes, etc. and finally got around to their sex lives.
Sue said "It's OK. We get it on every week or so but it's no big adventure, how's yours?"
Sally replied "It's just great, ever since we got into S&M."
Sue was aghast. "Really Sally, I never would have guessed that you would go for that."
"Oh, sure," said Sally, "He snores while I masturbate."