( Cut as scary topic with dire warnings, and definitely NSFW - you have been warned. )
Play safe, folks.
[Additional update, July 2015: In case anyone has stumbled across this post whilst looking for tips on how to safely experiment with solo breath play (otherwise known as auto-erotic asphyxiation), the answer is quite honestly "you can't." Sorry. If you don't have a romantic partner and are determined to engage in any sort of breath play, even including the things I have listed as 'safer' in this post, you might want to consider finding a friend who is willing to 'spot' for you, who will be present in the room to provide first aid or call an ambulance in case things go wrong. Even with something as simple as unassisted breath-holding or tantric breathing, the risk of things going badly wrong goes up exponentially without at least a 'spotter' present. My personal position on solo breath play is PLEASE DON'T. There is no way to experiment safely with erotic asphyxiation on your own.]
Play safe, folks.
[Additional update, July 2015: In case anyone has stumbled across this post whilst looking for tips on how to safely experiment with solo breath play (otherwise known as auto-erotic asphyxiation), the answer is quite honestly "you can't." Sorry. If you don't have a romantic partner and are determined to engage in any sort of breath play, even including the things I have listed as 'safer' in this post, you might want to consider finding a friend who is willing to 'spot' for you, who will be present in the room to provide first aid or call an ambulance in case things go wrong. Even with something as simple as unassisted breath-holding or tantric breathing, the risk of things going badly wrong goes up exponentially without at least a 'spotter' present. My personal position on solo breath play is PLEASE DON'T. There is no way to experiment safely with erotic asphyxiation on your own.]