Thank you for the detailed reply.

When I was researching this I came across some studies suggesting that other primates also communicate emotions using smell. Beyond that, I’m not sure — it’s an interesting question!

It’s a statistical correlation, so it’s still possible that someone with a bad sense of smell can be highly attuned to other people’s emotions. My guess would be that as far as being able to smell your own BO, there are a few factors: 1) people less sensitive to smells would probably be less likely to pick up on their own bad smells, which relates to this study 2) there’s also the phenomenon where if you smell something for a prolonged period of time, you get used to it, which is different than what the study looks at.