“…These asphyxial activities are practiced with the aim of experiencing fleeting euphoric sensations caused by hypoxia (reduced concentration of oxygen in the blood), such as visual and/or auditory hallucinations and bodily synaesthesia (the sensation of floating or falling), a 'sensory seism' 13 resulting from the effects of loss of consciousness caused by fainting 13,14 . These self-asphyxial behaviors were observed in children from a very early age (four years old) to young adults 1,6,12,15 . Among young adults, these behaviors are mostly related to hypoxyphilia -the restriction of oxygen to the brain associated with sexual pleasure 16,17 .…”