I compulsively count random things
I've only started doing this in like, the past 5 years or so as far as I remember and I can NOT figure out why. I count random things. Like stripes on the shirt of a stranger across a restaurant, birds on a powerline as we drive by, lights on a radio tower, buttons on a remote. It's usually not something I won't be able to finish like bricks in a wall I'm passing, or something that will get in the way of my interactions like ceiling tiles. I don't start consciously. I just realize I've begun counting, and wonder why, but have to finish.