Could you give examples of what kind of behaviours generated a "we don't do that here" or "you can't dress like that there"? Dutch/Belgian and French culture ar

Could you give examples of what kind of behaviours generated a "we don't do that here" or "you can't dress like that there"? Dutch/Belgian and French culture are quite different, even between Dutch and Belgian there are enough differences to create some friction, and I'm asking for examples because I would never expect a "you can't dress like that there" from Dutch people, for example. Uptight, surely, there are plenty of pockets of uptight cultures in Europe, even more in their largest cities. I consider Stockholm uptight as fuck but on the other hand I'd say that Malmö is pretty relaxed. Using Europe as a single, homogeneous thing is the same mistake as calling the USA a homogeneous culture. There are traces of culture in both places that are quite orthogonal across many regions but there's so many regional differences that it becomes irrelevant.