https://www.youtube.com/watch?v=VD-r6efv7kkI always describe it as every person having 3 friendship layers in their bubble: the outer one (which I call black one) is for total strangers, the intermediate one (gray) is for acquaintances that you hang out with but not really know your problems, and the inner one (white) is reserved for your close friends and people who really know you.
I feel like in the south the black layer is very thin, the gray is huge, and the white is very thin too - we let very few people really know our problems.
However in the Nordics I feel it's the other way around: the black and white ones are big and the gray ones is very small. So either you're a total stranger or you're best friends - and they make sure you know where you are
The Friendliest & Least Friendly Places I Have Visited Around the World