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