Even if the risk is not much with Knife play a person with a good enough imagination (I have an Extremely good imagination) can put the risk there (Never tried breath play, I would probley like it, just never met anyone brave enough to try it with, and I am not much on self injury, if its anything like that pass out thing we did as kids that was fun) One of my main sexual fantasies I die in the end. One of these days Ill get brave enough to post the whole story (One of those things that turns me on to think about it, the doing part is hell no)