A guy goes to the doctor to complain about a problem he's having 'down there'. The doc asks him the nature of the problem and the guy explains his average day.
"I wake up and me and the wife make love. Then when I go to work there's a blonde girl on the train every day. Since we have the carriage to ourselves, we have sex. Then when I get to work, I have sex with my secretary."
"So what's the problem" Says the doc.
"I'm not finished. I also have sex with my supervisor and then when I go home I have it off with the blonde girl again. And I always make love with my wife before we go to sleep."