Deduction

You know, a lot of times, you can find out things about people without ever talking to or even seeing them.

For example, I'm fairly sure that the people in the two houses across the street from mine aren't interested in astronomy. After all, if they were, they probably wouldn't have had their porch lights on during the Perseids, thereby creating annoying light pollution.

Dicks.

Incidentally, Perseid meteors seem to have a habit of popping up in whatever part of the sky I was just looking at five seconds before turning my head. I guess they're shy or something. They're like the ghosts in Super Mario games.