My sub and I want to live out a rather extreme breath-play fantasy that both of us have had for a long time. I want to emphasize that what I'm about to describe, if we act it out, is an ENTIRELY CONSENSUAL ACT. She has completely agreed to it, and I will in no way be doing anything that is (really) against her will. I want to (and she wants me to) choke her into unconsciousness and have my way with her while she is unconscious. I can handle the second part of that rather easily, so my question is this: How can I safely do this so that she does pass out from the asphyxiation, but does not die? Are there any specific facts, anatomical or otherwise, that I should be aware of before doing this? Is there even a safe way to do this at all, or is some level of risk (as I strongly suspect it is) unavoidable? If there is an unavoidable risk of death, what can I do to minimize it? Should I choke her in some specific way? Any information at all on this would be appreciated. And before anyone thinks to do so, please don't suggest that we not do this. If that is all you have to say, please do not comment. We both fully understand that there are grievous risks involved, and, I repeat, she has nonetheless entirely consented to the idea. My question is about how to minimize those risks. If, from the information I am able to gather, I come to the conclusion that the level of risk cannot in any way be lowered to a level I deem appropriate, then I won't do it. But as of right now, I am looking only for advice on HOW to safely enact our fantasy.