When we moved from Bangladesh to the US in the late 1980s, there were a couple of things that made us go “WTF?” One was the taste of chicken. In Bangladesh, you go buy a scrawny live chicken from the market and butcher it. It took me the better part of a year to be able to stomach American chicken, which tastes like wet cardboard in comparison. The other “WTF” thing was toilet paper. In Bangladesh, you rinse with wat…
Many things are becoming more and more homogenous globally - but I found that weddings, funerals, and indeed toilets appear to be somewhat resistant to that creeping homogenisation.
Many regions don't really use toilet paper, such as Iran, parts of Indonesia, etc. Personally, I like to have it handy, though in case of emergency pages from a Lufthansa flight plan work (try that with an iPad... (and yes, flight plans were printed and freely distributed decades ago)).
More importantly though, many many regions provide an opportunity to wash with water, either via a separate bidet, or built into the toilet ("washlet", as famously in Japan), or with a hose (bidet shower) next to the toilet. A revelation.
If you think about it, using only dry toilet paper is really rather primitive and disgusting. When I build a house, it'll have a German washing machine and dryer (maybe Korean), and a Japanese toilet.