Breath play, also known as "erotic asphyxiation", involves regulating or limiting a person's breathing in order to increase sexual arousal. This can be achieved using techniques such as chest compression or strangulation. It's important to note that this practice carries significant health risks and should be practiced with care and under the supervision of an experienced partner. It is also crucial to clearly communicate limits and safety instructions before starting any breath control activity.

Like any sexual practice, breath play requires informed consent and, because it is a risky practice, warning signs are essential. Here, the safe word is not enough, since the person will generally not be able to speak, but the safe gesture is essential to be able to signal to his or her partner that the practice must stop.