Hot can be a matter of what you are used too!

Indeed! My friend Roshan, on his last visit here, brought me a bottle of an Indian orange hot sauce. I took a teeny-tiny bit and about blew the top of my head off.
I couldn't believe it when I saw him swallow a teaspoonful with hardly a blink!
I reciprocated by introducing him to fresh horseradish, a New England brand called "MR."
I ate a tablespoonful on a small piece of bread and while it did clear my head it was no big deal.
However, when Roshan had a tiny bit on a piece of bread he had the same reaction to horseradish that I had to his orange hot sauce!
Chacun a son gout or whatever!