Autoerotic asphyxiation is when people deny their brains oxygen for purposes of sexual arousal. It's not unlike the dangerous "pass out game" played by young people in schools across America for a time, but it's' coupled with sex.  Generally, the person doing it times the asphyxiation to the moment of orgasm, and they claim the result is a unique and extremely pleasurable experience.  It's also incredibly dangerous.  Many people have died in the act.  So what's it all for?  What is this feeling so many people chase to the edge of life itself?  Here are confessions of autoerotic asphyxiation.