MikufanMore true words have never been spoken
db0I think body odor has an evolutionary reason to exist, and that reason applies to prehistoric humans living in small gather hunterer societies of <150 people only. Whatever that reason was, is not necessary for our survival in modern society where you meet thousands of people over your lifetime and run into new strangers constantly.
Coldus12I dont think body odor ever played an evolutionary role. As far as I know body odor is caused by bacterias eating and multiplying whenever we sweat. If this is the case body odor is here because we sweat which isnt that common within the animal kingdom.
(Although dont quote me on any of this, this is just what I seem to remember and Im lazy to look it up - tldr i might be lying)
There has been some research in this area pointing to being able to smell if someone is sick. www.ncbi.nlm.nih.gov/pmc/articles/PMC10550911/
Human scent as a first-line defense against disease
Individuals may have a different body odor, when they are sick compared to healthy. In the non-human animal literature, olfactory cues have been shown to predict avoidance of sick individuals. We tested whether the mere experimental activation of the ...