Social inertia. Toilet habits are very hard to change due to the taboo-ish nature of the topic, and the social expectation that toilets are more or less the sam

Social inertia. Toilet habits are very hard to change due to the taboo-ish nature of the topic, and the social expectation that toilets are more or less the same everywhere you go (at work or school, in restaurants, visiting friends or family, etc.). Anyone who spent a year is in a country like Japan or South Korea will have experienced that toilet paper is down-right barbaric compared to a jet of warm water appearing at the touch of a button gently rinsing the nether regions. You still use toilet paper, but only two sheets or so to dry up. But when you go back to a country that uses only toilet paper you either have to go out of your way (and pay a lot of money to renovate your bathroom) to find the kind of modern automated toilet seat that does add the features you've just left behind, or you just do as everyone else does.