Hi Daniella, I've done five mins in a bag, I was doing a lot of deep SCUBA diving at the time and my breathing rate was very low, but at the end the bag was conforming to my face and that first breath was, "a breath of fresh air".
That is so true. I have a plan to make one with repeated bagging by Mistress as a punishment when I next get the chance to play with her. I hope it will be fun to make and to watch! xxx