"It's a bit embarrassing doctor," I said, "but I've been married for 20 years now, and she's not as tight as she used to be. Can you suggest anything?"
"Well, it's a taboo subject, and obviously you'd need to speak it over with her first," he replied. "But have you considered using the other hole?"
"What??" I said, aghast. "And end up with a houseful of kids?"