We evolved hunger in low-food environments, now we gain too much weight. We evolved cleanliness urges in dirty environments, now we way overclean. It's still seen as a virtue though!
I am always fascinated by the 99th percentile laundry enjoyers because they seem to think there is no other way. Sheets and towels every week! All clothes washed as soon as worn!
This person does laundry about 30x as much as i do