Asphyxia refers to a condition characterized by the deprivation of oxygen to a body part or the entire body, which can lead to unconsciousness or death if prolonged. In a medical context, asphyxia is a serious condition that requires immediate attention. However, within certain subcultures, autoerotic asphyxia (AEA) or breath play has been practiced, where individuals intentionally restrict their oxygen supply to enhance sexual pleasure.

Strangling and hanging are two practices that have been associated with asphyxia, neck fetish, and eroticism. While these activities can be life-threatening and are often stigmatized, they have also been explored in various subcultures and artistic expressions.

Vascular injuries, such as arterial tearing, which can lead to delayed strokes.

The neck contains the carotid arteries and jugular veins, which are responsible for the flow of blood to and from the brain. These vessels are highly susceptible to external pressure.

In the vast majority of legal systems (including all 50 US states and the UK), you cannot legally consent to serious bodily harm or death. A signed waiver is worthless if an ambulance is called to a hanging scene.