Fire only exists naturally around volcanos or when trees heat up too much and burst into flames cos the sun's hot as fuck lad.

So that means that in places that aren't near volcanos or in climates that don't get hot enough for trees to spontaneously combust, the animals there would never see fire if it weren't for humans making it.

When cavemen learned how to make fire loads of animals must have been looking at it like 'wtf is that it's well warm?'