Why Is Engagement in Dangerous Behaviors Such as Autoerotic Asphyxia

Why is engagement in dangerous behaviors such as autoerotic asphyxia pleasurable? What is source of the pleasure?

A) Autoerotic asphyxia is NOT pleasurable as it often leads to death of participant(s) ; properly classified as a sexual perversion or mental disorder.
B) Derives from physical (reduced oxygen to brain creating euphoric state) and psychological (very personal and rooted in masochistic fantasy) .
C) Primarily physical: stems from Hypoxia, reduced oxygen supply leading to euphoric asphyxia, semi-hallucinogenic state, pleasurable enough on its own.
D) Primarily psychological: rooted in individual, intense fantasy life generally involving masochistic behaviors like bondage, self-restriction, pain/pleasure.