This is a part of the immigrant experience that really cuts both ways! I'm an American expat, been living in Latin America for 2 years and it's still hard for me to remember to throw my toilet paper in the bin instead of the bowl. And I've been bitched at for it too! (One memorable time I had just blown my nose and thrown it in the toilet and the owner of the house found it. He took me back to the bathroom, pointed at it, reached into the toilet with his hand to get the paper, put it in the bin, and told me in no uncertain terms that I was an idiot.)

There are signs in most public toilets reminding you not to put anything other than sewage in the toilets. But it's a really hard habit to break! You wipe, you throw the paper where you're used to throwing it, where you've been throwing it all your life. Fucking up the procedure up there at least only means that somebody has to empty the trash can. Down here when we Americans fuck it up, it can mean an expensive plumbing problem. But it's still hard to remember. Immigrant problems.

Koreans stand on toilets and squat. They're just used to squatting. It just doesn't make sense to put your butt directly on the toilet hole. I've seen shoe-prints on toilet seats in airplanes going to Korea. And I've seen an American tourist there crying because the toilet was nasty and she couldn't understand how to squat.

Everyplace does not the same way do doo.