'Strangling' is one kind of kinky BDSM sex which super risky & dangerous. I'd ever seen in a movie but at that time I didn't get it till I saw a case of a famous movie star died in a hotel. At first polices thought he committed suicide by hanging himself to the closet. Later it turned out he addicted to strangling climax.
Yeah people who do it by themselves die all the time from it because they pass out and there's no way for the choke to release itself. I wouldn't think it'd be dangerous with a partner though provided that they have enough common sense to let go of you if you pass out, and maybe deliver a few rescue breaths if it were real bad, but I don't know...
"It's like having sex." No dude, it's not "like" sex, it is sex, and kinky sex to boot, (what with all the choking and stuff). Lmao, he doesn't even realize what they're doing, idiot couple...