So like, I think it’s less to do with spiciness, and more to do with certain ingredients that people’s bodies aren’t used to, or even might have a negative reaction to.

Might also be that spicyness essentially is lowering the threshold that heat sensing nerves fire at till it’s below ambient body temperature, maybe, if someone not used to hot food it tricks the intestines in to thinking they’ve been burnt and releasing water as a sort of wound response? Maybe? IDK.