For medium and somewhat hot peppers, the rule is pretty simple. Don't eat more than you are willing to chew. Mostly this is a problem of eating whole seeds or big chunks of pepper you aren't actually chewing up and digesting.

Once you go hot enough, this won't matter. But I guess it's part of the experience.

Or simply skip eating it, just cut one chilli and put it into your soup/curry.

Not connecting the eating with the subsequent suffering.

This is legitimately my tactic, and yet I still wonder why my dog attempts to eat things that cause him issues.

Maybe he has a better understanding of the risks and rewards than I gave him credit for.

I brand my fermented hot sauce as “Burns Twice” so everyone is aware ahead of time.

I remember seeing one called 'Arson Fire' which basically conveyed the same thing.

Eating yoghurt along with chilies helps a lot to avoid problems the next day.

One man’s problem is another man’s opportunity.

Dairy. Milk contains a protein called casein, which breaks down capsaicin.

can confirm. i cannot eat spicy food, but when i have to i always ask for a big glass of milk.

Loo roll in the fridge.

if you eat spicy food regularly it won't happen to you.

I know what meme you’re talking about but I’ve never had this issue. YMMV

Secret, no, but not eating it is always an option.

What trouble?

diarrhea and irritation of anus/emorrhoids

I've never encountered this problem in real life, only on online forums, so I don't have any firsthand experience.

Maybe if you just eat spicy food every day you'll eventually get used to it and not have that problem? I've eaten (what some may describe as) spicy food for probably more than 90% of the meals in my life and it doesn't bother me.

Maybe some people don't entirely digest/neutralize the capsaicin before it passes through the body. I've also never really had this issue except one time some years ago when I ate half a fresh raw carolina reaper as a dumb drunk thing, which I assume has loads more capsaicin in it than what I normally ingest from spicy food.

I don't think there is any real, verified, universal connection.

well, that's what happens to me, even with a small quantity, every single time. And I know it's the chili because it burns like the mouth did the previous day