Sexual arousal and arousal achieved by reducing the oxygen supply to the brain. It is a paraphilia that usually involves one person alone (i.e., autoerotic asphyxia), but occasionally involves sexual partners (i.e., asphyxophilia).
Methods and tools used to achieve arousal include, but are not limited to, rope strangulation, plastic bag suffocation, hanging, and anesthetic inhalation.
Very dangerous, hypoxyphilia results in numerous deaths.