I absolutely love spicy food, and it’s never affected my gut. I was actually confused when I read about people getting the shits after a curry and wondered if it was a joke. I’ve had curries so hot it caused people to recoil into a coughing and sweating fit after they dipped their finger in and had a taste and I have one every other day. I feel the burning in my mouth, my face turns red, my forehead sweats, my esophagus feels weird, but (tmi I know lol) when I go to the toilet I’m completely fine. no gut pains either.
I was unbothered by it as well, at least intestinally, the physical pain of something hot enough was certainly something I could experience and dislike at the extreme end but my stomach and bowels would have been fine. That it until about the past 5 years or so when my stomach suddenly decided it couldn’t handle all kind of things that were never a problem before and now I totally get what people were talking about. It’s pretty sad, I miss being able to reliably tolerate highly spicy food.