Not all chilis are hot. Some are mildly sweet, others comfortably warming. Used in widely different cuisines on every continent, chilis originated in the Western Hemisphere. “Chili” itself comes from a Nahuatl word.
Oh, and for anyone who wonders why water doesn’t help when you’ve eaten a chili: it’s because the water spreads the capsaicin (the alkaline chemical that produces the burning sensation) across your mouth. Therefore you need an acid to neutralise it; drinks like milk (which contains lactic acid) and any citrus juice will help.