They can have hot breath while having a regular body temperature. Flint starters or a pilot light in their mouth combined with a high fiber diet and the right microbiome solve this problem.
The only question left is how to move the flammable gases to the mouth. Maybe they have sacs they have to fill with roughage in their mouth. Maybe the only barrier in their digestive system is at the end so eau de colon just constantly seeps out.
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They can have hot breath while having a regular body temperature. Flint starters or a pilot light in their mouth combined with a high fiber diet and the right microbiome solve this problem.
The only question left is how to move the flammable gases to the mouth. Maybe they have sacs they have to fill with roughage in their mouth. Maybe the only barrier in their digestive system is at the end so eau de colon just constantly seeps out.
Yes I know that’s what one approach. I was trying to consider the case where they can’t help have their breath be superheated