@ElleGray I love that!
It got me thinking about silent relationships with strangers. In my first college I had 1 class that was just down the hall from the class before it, so I would usually get there a few minutes early. There was always a girl there studying. I just assumed she was in the earlier class, and just stayed behind 'til the next class because it was quiet and convenient. When I came in the room I would say hi and sit down, and she would say hi and go back to reading,.