Involuntary Muscle

Professor Higgins at the University of 

Sydney was giving a lecture on ‘Involuntary 

Muscle Contraction’ to his first year 

medical students.

Realising 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 arsehole 

is doing while you're having an orgasm?'

She replied, 'Probably out 

golfing with his mates!'

It took 45 minutes to restore 

order in the classroom

Thanks Nominedeus (link)