This is moronic. Its unbelievable that so many well paid, "highly educated" professionals give this kind of nonsense credence.
The girl elected to have a little flip out episode after she told her boyfriend "I'm about to dissociate". She obviously had no conscious part in her decision, right?
Nothing is mentioned about her being under the influence of psychoactive substances - so discussion on that is reaching for a justification of involuntary action where there is none.
Now the boyfriend writes an overly-dramatic piece about it for the beacon of overly dramatic hipster fanfare: vice. Its his little proclamation of how much he loves a girl that manipulates him with ease. Maybe many of you of upvoted this identify with that aspect.