system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do americans seem to be so friendly towards others in contrast to many european countries, where it's rude to talk to complete strangers?

I'm just wondering where this comes from. I know this is not everywhere the case and I don't mean to insult anyone! But i think it's safe to say that americans are overall friendlier towards strangers and will more often strike up small talk with people they don't know or have just met. It's downright rude to randomly talk to people you don't know where I'm from, because it makes us uncomfortable, I guess? I have no Idea why to be honest, we just keep to ourselves.
gpt
On the other hand I've noticed that Americans often just pretend to be friendly. Like, they'll ask how you are, but if you actually want to answer they're really not interested.  
Human social behavior around the world is weird.