Breath Play should only be practiced with someone that is very experienced and does it a lot. Even still you should get to know the person well that you are playing with and trust them with your life before turning your power over, with an activity like this. Much can go wrong and it is very risky in the wrong hands. There are many different types of breath play and some are much safer than others. The riskiest type is pressing on the carotid artery on the neck. This can make someone pass out in a matter of seconds. Blocking off a person’s airway in this way for too long, 10 seconds or more, can actually kill someone. This also reduces brain cells each time you play, in this manner. I personally recommend staying clear of this type of breath play which also can encompass a rope around the neck or something similar.
Cutting off the air in other ways is much safer, like face sitting or using an inflatable gag while pinching the nose. Many people get addicted to the increased high that they can achieve when cumming. Like I said previously you should never do these practices by yourself and only with someone that you know is experienced in breath play. I always practice Safe Sane and Consensual Play and everyone should be doing the same.