A Professor was giving a lecture on "Involuntary Muscular Contractions"to
his first year medical students.

Realizing that this was not the most riveting subject, the Professor
decided to lighten the mood slightly.

He pointed to a young woman in the front row and said, "Do you know what
your ass hole is doing while you're having an orgasm?"

She replied, "PROBABLY OUT HUNTING WITH HIS MATES"