They could so easily be dead. The same body that is having those orgasms could be killed. Someone could kill them, not caring about their naked bodies and the arousal involved. They masturbate their bodies while they are still alive. At any time, they could be incapable of masturbating due to being dead. If they had a gun to their head, both the victim and the killer would not be thinking about the body that is about to die touching itself and orgasming.
