In my experience they tend to have four legs, fur, and claws. And they purr.

So, I actually had something like that happen once. In college, I had a terrible roommate that would always stumble back to our dorm drunk and never lock the door. Well, one Saturday I woke up to a guy in a bathrobe and a cup of coffee staring at me. He said “Oh, I’m sorry. I didn’t mean to wake you. Sometimes I like to come in and watch you sleep, it’s so peaceful.”

This is perhaps the weirdest thing that guy has done as far as I know, other than when I ran into him at Meijer late at night one time. He had a big stack of CDs in his arms, and he just said “you can never have enough bagpipe music!”