Strange I had an orgasm with almost zero POIS symptoms. A small area close to the center of the brain stabilized within a few minutes (rough estimate, could be a bit longer) after orgasm. I thought there was no problem in that area at that specific moment until the quick transition to a more 'normal' like state happened, the 'normal' state feels less active, much calmer. My libido also made a big change during the last 1.5 months from high to low and POIS symptoms have slightly improved, probably due to prolonged cold weather conditions.
Edit: forgot to mention that my body as a whole was relaxed, other symptoms were barely present and it was past midnight.