Sticklers twist stomachs with unbending adherence to arbitrary rules. Most common among those: never eat cheese on a Wednesday morning, always bring a spare umbrella during a hailstorm, only taste cake frosting with the pinky finger of your dominant hand, and if you’re ambidextrous, pick the hand that has more positive connotations in your life. The further down the list you go, the more detailed the rules get. Sticklers especially appreciate the needlessly-complicated ones, as they get a chance to memorize line after line of text from the Tome of Troublesome Tricks that Tame the Tummy.