what are the mma rules?
['No groin attacks.', 'No knees to the head on a grounded opponent.', 'No strikes to the back of the head or the spine.', 'No head butts. (Sorry, soccer fans.)', 'No eye gouging.', 'No fish hooking.', "No fingers in an opponent's orifices. (Eww!)", 'No biting.']