system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:why have human beings developed body odor?

What is the positive aspect of body odor? I know bacteria cause B.O. with their waste. I'm Interested in learning if there is an evolutionary advantage to having body odor.
gpt
Not everything that happens to a species is good. Especially humans who have a number of prominent aspects that are pure negatives. BO is caused by humans accidentally wondering into a symbiotic relationship with a kind of bacteria that creates a horrible smell when they come in contact with sweat, which doesn't smell good in the first place. This is why bathing helps curve the smell.