What I don't understand is, how can you possibly enjoy orgasm while struggling for air?
I don't know about you, but when I have an orgasm, it wipes me out. I am gasping for air at that time without a bag being on my head. So you utterly spend all your energy masturbating and then have no energy or prescence of mind to take the bag off? Or is it usually a practice where you depend on your partner to take the bag off in case you are too weak? If so, then why do it by yourself?