“I’m guessing from his lifestyle (and love of life and tacky ways) - that this was an auto-erotic act that went bad.”
That is possible. And it is also possible that a sex partner who participates in this could easily commit murder, or at least choose not to render aid when the other person is in a life-threatening state. There are also assassins who use sex to access their victims. Sounds like something out of a movie, but this stuff exists within the upper echelons of power.
It might explain why Hollywood types are so angry... Bourdain doesn't really fit with the dregs... it's just odd that someone with that much to live for - and a person who rejected corrupt elites - would take his own life out of sadness. He seems better than that...