Yeah, it's a thing. I'm not Asian either, and I also taught myself to do it when living in Korea as a teenager long ago. Koreans took for granted that the groun

Yeah, it's a thing. I'm not Asian either, and I also taught myself to do it when living in Korea as a teenager long ago. Koreans took for granted that the ground was filthy--with good reason in those days. They would never touch it with anything but their shoes, then remove their shoes on entering any place where they DID sit on the floor (home, some restaurants). So, when outside for extended periods, they would use their own legs as a chair, which I found very difficult to do at first. But I trained myself, and my kids (who can't do it) think it's a very amusing skill.