I have regularly seen in several countries in Europe a relationship going from inexistent to committed, public and exclusive in a matter of hours. “Having the talk” is often understood as an intent to break-up (because it sounds like “We need to talk”). Whether a meeting has a romantic interest is never really expressed: it’s generally either obvious or purposely vague than anything. That has lead many American friends in Europe very frustrated with the dating scene, because it comes off as unreadable. Europeans in the US can find the formalism icky, but they generally adapt more easily.
There are also far more differences between European countries (wolf-calls are apparently common in Italy; Scandinavia can come of as the opposite) than with the US — but formalism is certainly the big one.
I can see why Americans would be viewed as tending to wear shoes inside, since I've seen a much stricter adherence to not wearing shoes inside in Japan (to the point of having separate footwear for bathrooms).
American here. Neither I nor, to my knowledge, any of my close friends in relationships have had this "talk" you speak of. In my experience, expectations around monogamy (or not) are not explicit but typically pretty clear from the nature of the relationship.
Practitioners generally describe it as a positive reaction; feminists see it as sexist and objectifying, up classify it as sexual aggression.
> Whether a meeting has a romantic interest is never really expressed
That's because to most Europeans a meeting is just a meeting, a pleasant way to spend some time in conversation and maybe getting to know a person better. Romantic interest, a friendship, or an acquaintanceship, may develop from that. If it doesn't end up being romantic in nature, that doesn't usually mean the meet-up is considered a failure.
Now, I would contrast that sharply with "player" behavior (as applied to both sexes), which is virtually the same in both the US and the EU.