Hold Up here... true about the oxygen thing.. i gotta say.. but also that lack is a total turn on for me.. cant say much for other ppl .. well because we arent all into the same thing...but it also has alot to do with being on the edge... as i said.. i get off on adrenaline rushes...I cant explain why but i know that adrenaline is a chemical that is released by the brain during a time of pain.. its a shelter for ur body... ( medical background here )... and I am into anything that has to deal with pain.. just the way i am