I think so much is culturally influenced, even down to our posture.

The toilet issue is so difficult. I work in a highly diverse area and there is a lot of conflict due to crouching, water bottles, and other things. I think there tends to be hostility because some things (ie crouching) don't mix so well with our culture unless you aim really really well.

Re the carrying things on your head, didn't anyone else have deportment lessons where you had to walk with a book on your head? Kinda sorta almost the same thing? Of course I'm not saying my etiquette lessons really worked....though it would be handy to carry groceries on my head as opposed to the backpack.

I think crouching for sitting is a wonderful thing. Imagine not relying on furniture? And I bet that stretches your quads too. As far as us (ie me) relying on crouching for sitting and other functions, ack! I would not adapt so well though it would probably be really good for me. Usually when I travel, I try to conform to whatever cultural norms exist where I go. Perhaps I will crouch some day but for sure, people in the U.S., will hear the creaking in my knees as I do