Involuntary Muscular Contractions
A professor at the University of Sydney was giving a lecture on 'Involuntary Muscular Contractions' to his first year medical students.
Realizing this was not the most riveting subject, the professor decided to lighten the mood.
He pointed to a young woman in the front row and asked: "Do you know what your arsehole is doing while you're having an orgasm?"
She replied, "Probably playing golf and drinking beer with his mates."
It took 15-20 minutes to restore order in the classroom...
