As children, we're taught to keep our distance from strangers at all costs. No matter the circumstances, we are not to talk to strangers or accept favors from them, even if they're trying to help us.
However, as adults, the rules change - and we find ourselves interacting with strangers on a regular basis, sometimes in very surprising and intimate ways. Some strangers leave such lasting impressions we regularly think of them years later, hoping to cross their paths again.
A stranger in a small boat saved me from drowning in a river when I was 14. I didn't know how to swim. While waiting for an ambulance, he told me that he, too, almost drowned in that same river when he was a teenager. I never saw him again, but I still think of him whenever I go for a walk near that river.
I was, at all places, a Jimmy Buffet concert. Kind of buzzing and was walking down to get another beer. Beautiful hippy girl glides up and says, "Hey, can I get a smoke?"