I've lived in homesteading environments where numerous people go months bathing sparingly using just water, while still actually getting things done involving significant labor, sweating and generally getting dirty.

Everyone reeks in these conditions. They don't realize it, and their intimate partners who are in constant contact also don't quite appreciate the degree of odor, because it's shared.

But from an outsider perspective, it's ripe.

There's probably an evolutionary reason for this, members of a tribe will smell similarly when eating the same food and sharing space/objects in close quarters. I can easily imagine how that would be advantageous. Foreigners will stink.