Two married men are in a pub discussing their love life when one says, "Have you ever tried playing doctor?"

His mate says, "No what's it like?"

The man replies, "It's amazing me and my wife were playing for the whole of last night must of been about 10 hours."

His mate, shocked says, "10 hours!? How the hell did you manage that long?"

"I just left her in waiting room for 9 and a half hours."