Most people have taste receptors in their gut as well as on their tongue. It helps regulate how quickly your muscles contract to move stuff along through your intestine.
Some people don’t have as many, and some people build up a tolerance to capsaicin (in both their mouth and gut).
Libra@lemmy.ml 2 days ago
I used to live in New Mexico for a while and there was a common joke: how do you tell if someone is a native New Mexican? They keep a fire extinguisher in the bathroom.
It’s not so much that you taste it on the way out, it’s that there’s undigested capsaicin that burns, uh, other mucus membranes on the way out. Fortunately not something that bothers me much either, but I get hints of it sometimes when my niece makes what I call her nuclear fire curry.