Out of curiosity, do you (and this question is open to other compulsive selectors) tend to play with things physically when you read as well? Eg. subconsciously pick up a nearby object and start playing with it.
(I do both, and I suspect they tend to go together)
Yeah I'm the same way. I'm a compulsive highlighter and I often find myself disassembling pens or mechanical pencils, or folding paper, or removing the plastic coating inside a bottlecap, or balancing my glasses on the tip of my finger...The people I spend time with in meetings must wonder if I'm actually paying attention.
Not while reading, but I'm notoriously bad when I'm on the phone...small objects all over my house and office are in a constant state of displacement because I pick them up and set them down somewhere else while on the phone.
