i'll be frank.
on a normal day, i would say, going to a bathroom is a solitary experience steeped in muscle memory and repetitive custom so much so that generally, i would say that we take for granted the knowledge required to 'go to the bathroom.'
something that always takes me by slight surprise when i visit japan is the brainpower required simply to use a bathroom facility properly.
european style toilets are de rigeur in most homes these days, but if you happen to find yourself really trying to get a taste of japan staying in traditional inns or old world style yakitori (skewered chicken) houses, ladies, be aware that you might be squatting upon a glorified hole in the ground. porcelain, yes, but it doesn't make that whole process any more graceful than if you were camping.
but holes in the ground have existed since antiquity- what really gets confusing are the seated toilet contraptions. firstly, most toilet seats are heated. i remember the very first time i realized this, and that the heat wasn't from someone else who had sat on the toilet for a very long time (to warm it, just for me presumably). warm toilet seats at home inspire in me the same kind of disgust i have for standing in a shower or bathtub after the water has stopped running (my old roommates know about this well- and have complained about the lake i would make on the bathroom floor since i refused to towel off actually standing inside the shower). but no, out of courtesy or comfort for the sitter, the seat is preheated. and now i'll never know how long the person before me was there...
many toilet seats in homes are covered. not just the lid part, but i mean the whole seat. at my grandparent's house, it is covered in a terry fabric, like a towel. think as you wish about this one.
we haven't even covered the basics of 'how to wash your bottom' yet. in public facilities in metropolitan areas, there might be signs inside each stall in english to try to explain to bewildered westerners that of course you should spray your butt with water of all different pressures and fountain shapes every time you go to the bathroom. i've never been in the men's bathroom, but really, there is a bar on the side of each seat- kind of like a remote control for some ride- with pictures of fountains for front, back, and a whole bunch of buttons i'd rather not press while seated for fear of some sort of surprise niagra falls emerging from the throne.
ok, and then, there are always two different size flushes, naturally, for different sized excrements. and then, in many homes, when you flush, there is a little faucet that sprouts water to wash your hands with, a mini sink of sorts.
in public bathrooms, many stalls have little stools or seats for children and babies. there are always multiple hooks for coats and purses, and most likely you'll find toilet seat sanitizer (with signs that say 'please push 5 times to apply cleaner enough') for you to sanitize the seat upon which you are supposedly going to spend some time with the bidet.
brain tired yet? not to mention, most everything is automatic and electronic, including a faux flushing sound that turns on when you start to go to the bathroom so nobody can hear your real tinkle...
don't you think you could spend eons in there? and how do we ever survive in the brash west without heated seats with remote controlled bidets and faux flushing noises?
really, i don't know, because girls only poop roses anyway.