any sexual play that carries serious risk of physical harm including breath control/asphyxiation, electrical play, bloodsports, and fire play; can also be applied to play that breaks a person’s previous boundaries
Many people who play with pain in an S/M context do it for only the physical sensation – an endorphin high caused by the body reacting to stimuli that they perceive as pleasurable instead of (or because of) pain.
forcing water or another liquid (ie. soap, lemon juice, cod liver oil) into the anus and subsequently the bowel or lower intestine via a nozzle/tube; enemas can be given for sexual arousal, for cleansing purposes, or for humiliation of bottoms
sexual arousal from being watched in a public space while performing sexual acts
toy that is placed over a penis to extend its length