Involuntary Muscle Contractions

Involuntary Muscular Contractions

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, "He's probably duck hunting with his buddies."