Off script joke:::: A Professor was giving a lecture on 'Involuntary Muscle Contraction'

to the first year medical students.

This was not an exciting subject and the professor decided to lighten up the mood.

He pointed to a beautiful young woman in the front row and asked, 'Do you know what your asshole is doing while you're having an orgasm?'

She replied, 'Probably golfing with his buddies.’