system
Given the following post, respond as if you're commenting on Reddit:
human
If no one on Earth ever used deodorant, would we notice the bad smell? 

Everyone would be smelly as hell, but because the smell is consistent, I'm thinking we wouldn't notice it anymore, or not?
gpt
You haven't lived with enough hippies.  If no one uses deodorant, you notice the smell, but your mind doesn't label it as "bad".  It just smells like "humans".  No more offensive than the smell of freshly cut grass.

This is the natural state of humanity.  Many historical cultures have kept clean, that is certainly a good thing.  But using aluminium salts to inhibit all underarm sweat is a recent idea, people didn't go around being offended by each other's odor every day of their lives.