What are some interesting little cultural differences?

I have lots, because I collect them as a hobby, but I’ll start y’all off with a couple of examples.

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In the USA, the middle lane is used for overtaking, so people get pissed off with “middle-lane hoggers”, who drive slowly in the middle lane.

In the UK, the ‘outside’ lane (closest to the central reservation) is the ‘fast lane’, which is used for overtaking, so driving at regular traffic speed in there will piss people off.

This makes perfect sense, because then you will only have people overtaking you on the outside, which you are much more aware off.

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In Canada, it is absolutely normal to buy a bag of milk, which fits into a conveniently proportioned receptacle for the fridge door.

Canadians are the only species known to exhibit this mysterious behaviour.

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In China, it is completely normal to hack up a load of phlegm and spit it out… even in the subway… even for women… young, otherwise attractive women… Twas most disconcerting the first time I saw that.

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In Japan, blowing of the nose in public is pretty much as offensive as pissing in the street.

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And now you!