...Are you saying that the rest of the world have not a single idea, which temperature is burning hot and which temperature is freezing cold?

All of that is just a matter of habits/familiarity. If you are used to Celcius, you know 0℃ is freezing cold, like literally. Anything beyond 40℃ is "shit just got real" territory.

If you want to call out "but 40 is not an intuitive number!!" then I would briefly mention that 212℉ is not an intuitive number for the boiling point of water either.