Very interesting. Thanks for the info, CertainlyPOIS.
The more I think about it, I really think I DO have a digestive enzyme deficiency and/or mucus in the small intestine that blocks absorption, because every time I eat lots of protein or fat, I get loose stools .. and for the last 5 years, it's felt like my entire body has been disintegrating, and I can't build up any muscle mass, which sounds a lot like lack of protein absorption. And perhaps the brain fog and mental symptoms come from a lack of dietary fat absorption... because fats are important for the health and function of nerves!
These are constant issues for me. But perhaps the fact that an orgasm makes these symptoms worse is what we call POIS... and perhaps THAT has to do with a mineral deficiency, specifically Zinc and Selenium, like Herman wrote.