Curious

Sometimes I wonder if the things I do are the same things other people do. Is it just me or is it human nature? Whenever I am driving behind someone moving very slowly on the highway, I follow for short time because I am not a big lane changer. When I realize that they have no intention of moving faster, I go around them. Here is where my question comes in. As I am passing them, I have to look to see who they are. Are they young, old, male or female? It really makes no difference, yet I still do it. Yesterday the person's car had dark tinted windows and I was annoyed that I could not see who they were. Is it just me?