Asphyxiophilia

Erotic asphyxiation is the intentional restriction of oxygen to the brain for the purposes of sexual arousal. With a partner, the act often involves strangulation. The term autoerotic asphyxiation is used when the act is done by a person to themself. Colloquially, a person engaging in the activity is sometimes called a gasper. Erotic asphyxiation can lead to accidental death due to asphyxia.