When a man lays on his back, with his pants at his ankles, pulling his knees up to his chin, and having sufficient relaxation skills to allow his testicles to hang loose over his anus, he then expels gas, with such a force as to move his testicles out away from his anus, so that onlookers can verify the sack-to-sphincter air gap.
by TF Gumby December 7, 2007