This one is pretty funny if gross.
I was going to state a little known fact about Iranian men's toilet habits. . . but I'm eating lunch at the moment.
OK, ok: traditionally, men pee whilst kneeling. It's a hygeine thing. I don't want to go into specifics.
Anyway I once saw a traditional, Iranian-style squat toilet in Japan. My Japanese friends assured me that it wasn't an Iranian import -- it was the traditional Japanese toilet too, before they got all fetishistic about it using high-tech toilets that automatically wash your bum and play music and spray perfume etc.
Dirty public toilets and bad driving habits -- twin causes of national shame for Iran.