How do massage therapists keep from getting bored?

I've been getting regular massages for about a year now, and I wondered about this today. I know each massage is different, but I think I would get bored or let my mind wander after being a massage therapist for a while.

The other question that occurred to was what kinds of things can massage therapists tell about people based on the massage? For example, I foster kittens and I always have lots of little scratches on my legs. I mention it to my therapist if I'm meeting them for the first time, but I don't know if that's necessary/if they care lol Can you tell things like what kind of job a person has by which muscles are tight? Or do you see patterns in groups of people?