It's not that they have never seen them, its a public/private division. Many Chinese homes have sit down toilets in their bedrooms bit squat toilet in the first

It's not that they have never seen them, its a public/private division. Many Chinese homes have sit down toilets in their bedrooms bit squat toilet in the first floor since that is a public area. Standing on a sit toilet is more about not wanting to let your butt touch a public toilet than not knowing how to use one.