Redskinluver:
Similar to what I have heard of people killing themselves by hanging by a noose around the neck and masturbating. Stupid and very very dangerous auto-eroticism.
A number of well known people have killed themselves like this. In 2009 David Carradine (actor Kung Fu in the 1970s) was found dead in a closet in his hotel room in Bangkok, Thailand, due to a fatal autoerotic asphyxiation accident.
I can remember a male UK politician from the 1990s as well vaguely. Reported in the press found dead having an orange in his mouth and dressed in stockings.
In the UK in Channel 5's "The Sex Business", latest series, episode 1, (still available on the catchup app), which was about female BDSM submissives. One of the professional submissives said she started off as a young girl putting a belt around her neck and masturbating, then moved on to getting boyfriends to strangle and choke her, then seeing internet pornography and becoming a professional submissive.
galt54:
I also would recommend against knife-play for obvious reasons!
I didn't know about this as well until I began researching this choking sex play. In a YouTube video one of the teenage girls talking about choking during sex said she also liked boyfriends to caress her body up and down with a knife and perhaps hold the knife to her throat prior to sex.
Yes I could see bad accidents happening with this as well.