Involuntary Muscle Contractions

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A professor at the University of Mississippi 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 slightly. He pointed to a young woman in the front row and said, ‘Do you know what your asshole is doing while you’re having an orgasm?’

She replied, ‘probably deer hunting with his buddies.’