Back when I was in college, I took a short-story writing class as an elective. Don't remember much about it except for the fact that we had to buy a book on short stories that largely consisted of lists of things that could be included. One of those was "Unconscious Habits", and it had things like nose-picking, cracking knuckles, adjusting glasses or clothing, etc. So I thought it might be useful (and possibly fun) to share our own little tics. For example, I find it almost impossible to get out of the shower without toweling off my head. Even if I've deliberately kept my head dry. Even if I've been wearing sandals all day and just rinsed the dust off of my feet. Also, although my arms and hands are moderately hairy, I have no hair on the distal middle phalanges of my index fingers from years of undoing the laces on combat boots by looping them over my fingers and pulling. The follicles just got sanded off at some point. Your turn.