Gasmasks

With Breath Control, also called Breath Play, someone is limited in order to increase the erotic pleasure and so that he or she reaches an unprecedented orgasm.

So it is literally and figuratively about breathtaking sex. In most cases, breath control is part of a BDSM game between a dominant and a submissive. In some cases it is done solo while masturbating. The dom is the one that restricts the submissive’s airflow. In breathplay, the sub’s brain does not receive enough oxygen, which causes euphoria (very pleasant, increased stamina), and due to the lack of oxygen, an orgasm is reached earlier during the act and usually an orgasm is much more intense than normal.