Yes. Well, at least some people do. The sensation of not being able to breathe due to a partner beginning to choke or asphyxiate you can hugely intensify orgasms. Part of it is a thrill of danger/ straight forward masochistic fantasy - but due to reports that a hanged man will often ejaculate with his last breath, I suspect the sensation of being close to death and having one last desire to reproduce/ experience pleasure has something to do with it as well. I should probably be responsible and attach a bit of a warning to this: Although its a fairly common fetish and practiced by a fair few people, its also one of the more dangerous ones. Most sex manuals will recommend that this is one you stay clear of (particularly if your partner is male, as the tendency to squeeze that little too tight at the moment of climax is difficult to overcome), and if you are determined to give it a go- stick with using hands, where you can judge the pressure more easily, as opposed to using ropes or other devices, and don't try to do it on your own (if you heard the alternative theories about Michael Hutchence's death you'll know why..) Asphyxiation carries risk of brain damage and death- and I've heard of at least two people meeting an untimely end this way- so give it a go, but for God's sake be careful!