E L Lloyd notes that they may be similar to the hallucinations experienced by climbers at altitude.He further notes that no such state occurs in hypoxia brought about by sudden aircraft decompression at altitude.These findings suggest to him that they do not arrive purely from a lack of oxygen.
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Observers at public hangings noted that male victims developed an erection, sometimes remaining after death (a death erection), and occasionally ejaculated when being hanged.
However, post-mortem ejaculation occurs in hanging victims after death because of disseminated muscle relaxation; this is a different mechanism from that sought by autoerotic asphyxiation practitioners.
Various methods are used to achieve the level of oxygen depletion needed, such as a hanging, suffocation with a plastic bag over the head, self-strangulation such as with a ligature, gas or volatile solvents, chest compression, or some combination of these.
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co.
Erotic asphyxiation or breath control play is the intentional restriction of oxygen to the brain for the purposes of sexual arousal.
This sexual practice is variously called asphyxiophilia, autoerotic asphyxia, hypoxyphilia.The term autoerotic asphyxiation is used when the act is done by a person to themselves.Colloquially, a person engaging in the activity is sometimes called a gasper.Author John Curra wrote, "The carotid arteries (on either side of the neck) carry oxygen-rich blood from the heart to the brain.When these are compressed, as in strangulation or hanging, the sudden loss of oxygen to the brain and the accumulation of carbon dioxide can increase feelings of giddiness, lightheadness, and pleasure, all of which will heighten masturbatory sensations." Author George Shuman describes the effect as such, "When the brain is deprived of oxygen, it induces a lucid, semi-hallucinogenic state called hypoxia.Combined with orgasm, the rush is said to be no less powerful than cocaine, and highly addictive." Concerning hallucinogenic states brought about by chronic hypoxia, Dr.