When I was perhap 14 or 15, I almost choked myself.
It was in a weekend or a vacation in the middle of the day. I had been reading all day wearing my dressing gown (is that the name for it when its for a man?).
I cant remember how it started, but I discovered that my face looked when I pressed my hands against my throat - I was standing in the bathroom looking in the mirror - it felt like my eyes would pop out, the skin got dar, and large veins appeared. At some point, I got the idea of using the belt from the gown, tying it around my neck, and I was having "fun" trying to use the muscles of my neck to loosen the belt.
Then suddenly my knees buckled under me, and it litteraly took my last strength to loosen the belt from my neck!
Funnily enough this wasn't a sexual game, I only discovered much later that some do stuff like that to increase the feeling of arousal. It wasn't that the idea would have been foreign to me, I always were very imaginative with respects to my frequent masturbations at that age.
I actually have told only very few people of this experience - when I think about it still makes me feel uncomfortable - Imagening my mother finding my strangulated in the bathroom! (a few seconds longer I wouldn't have cared myself)
/Sren