Ouch all your stories makes my experiences sound mild...
Normally I eat a lot of spice... Since I'm still young or was at least...so I always chug down tons of spices. IE. at Dim Sum I'd ask for hot sauce, and those lil dishes they gave me were never enough, til they just gave it to me in a bowl / cup similar to the size for rice.
Wasabi wasnt even enough til it choked and went up my nose with a slight burn...Western restaurants, would literally see red tobasco sauce spilled on the food like its the sauce. Anyhow, building tolerance like that usually was fine until I had to drop a bomb, then my rear would be on fire but still fun.
One day, I tried taco's and they had hot sauces as well as habenero sauces. Used a bit of both and had no effect, so I doused my taco in tons of Haberno sauce as well. My biggest mistake as I was consuming it like my other sauces. Well it took its time to slowly burn and light up. Literally felt like I needed to stick a tube in me to suck it out with the amount I consumed and how red i was becoming since my stomach was burning, so chugged down milk. Literally finished 2x 4L jug of milk (one right away and another by the next day). My rear and stomach was on fire for days. Literally after that, realized I should tame it down. All good things in moderation LOL