Does crossing paths with strangers freak you out, even a little?

Often, when I am walking or driving, I have a strange sensation when passing random strangers. I think, we just “interacted”, albeit briefly, and yet the other person is living their own life and is blissfully unaware of my existence. Frequently, I wonder what they are doing, where they are going, what the minutiae of their life is like. Is that strange, or do others feel the same way?