Definitely learned behavior. I get itchy if I go for a day without showering, but I know there are cultures and times where people bathed once a year, never washed their hair, and it was totally normal to them...

I'm good with bathing, but housecleaning is a mystery to me--my parents sort of did it and then expected me to catch on intuitively, which I did not (and then yelled at me when I didn't, which gave me Issues). It's taken me several years to figure out when my floors need to be vacuumed, and will take me longer to start caring.