it's also bullshit because putrid smells trigger an involuntary response in the brain. it's biological to not like bad smells. medical texts believed bad smells to be bad for health and we have legal documents and edicts which put fines on putrefaction and spreading bad air. there's also zoning documents, which forced butchers and tanners and other stinky industries to be outside or on the edge of the city or down river. this of course doesn't speak to every city or experience universally, but people already speak too generally. india still exists today, even after the proliferation of personal and public hygiene.
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