Professor Higgs at the University of Sydney, Medicine, was giving a lecture on 'Involuntary Muscle Contraction' to first year medical students.
This was not an exciting subject and the professor decided to lighten up the mood. He pointed to a young woman in the front row and asked,
“Do you know what your a**hole is doing while you're having an orgasm?”
She thought about the question for a moment and replied,
“Probably fishing with his buddies.”