But depending on how it's done, may possibly damage your vision: https://www.sciencedirect.com/science/article/pii/S245199361...

Erotic asphyxiation is way different from intermittent hypoxia. Typically erotic asphyxiation is cutting off the flow of blood to the brain by constricting the veins and/or arteries in the neck. Intermittent hypoxia in the case of divers and Wim Hof enthusiasts is a breath hold. This doesn't cause a spike or decrease of blood pressure in the brain.

> Intermittent hypoxia (IH) entails alternating between intervals (typically 2–6 min in duration) of breathing normoxic (i.e., room air) and hypoxic (i.e., FiO2 of 10%–13%) gas mixtures and is a protocol that increases CBF and has been identified as a potential intervention to improve brain health (Panza et al. 2023). The onset of a hypoxia interval elicits an acute response wherein a rapid chemoreceptor-identified reduction in arterial (SaO2) and cerebral tissue (ScO2) O2 saturation stimulates increased ventilation and heart rate (HR) to maintain homeostatic O2 delivery

I wonder if she rolled her eyes hard or something.

Anyways, erotic asphyxiation is such a bad idea.