S is for Self Bondage
Self bondage, like its name implies, is about putting ones self into bondage. It is also a hotly contested and someone spurned practice in the BDSM community due to its extremely dangerous nature. People in bondage that can’t get themselves out are just asking for problems, especially if no one knows about it.
There have been many cases over the years where people have tried self bondage, got into trouble and unable to release themselves and have met with a less than timely death.
Word of advice: Just DONT do it (sorry Nike 
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