I don't remember any time in my life where it ever felt normal to me to randomly talk to strangers. I went to London when I was a teenager and was made uncomfortable by how chatty the cab drivers were. Later, I worked at a startup and my boss was preternaturally gifted at chatting up strangers, which he did habitually in every setting we were in when we traveled; on the plane, on the bus from the airport, &c. I remem…
Talking to strangers is a skill. You can practice it! I've made a point of trying to practice, albeit halfheartedly, and even though it's difficult for me, because I like it when other people try to talk to me . Earbuds stop this practice dead in its tracks. You can't deny that.
Yes it's a signal. For you to go find someone else to talk to :)
That doesn't mean I'm antisocial, there's just places where I go to be open to talk to people. Like bars, meetups, stuff like that. And places where I'm just to get from A to B and I don't want to. Usually when I'm in public transport I'm going to/from the office and I'm stressed because I deeply hate working in the office since Corona (no more fixed desks etc). So I need my space.