Do you have a habit that requires extensive overseeing every detail? Maybe a quality that got you dumped (i.e. Looking at each piece of popcorn you eat before finally enjoying). When you witness someone else disturbing one of your obsessions, your eyes dialate and you go into "maniac/fix-it mode". Pictures are always welcome.
I am fanatic about the way my towels are folded. Hamburger style once, followed by the same directional fold, then finally fold over. This way, the towel band at the ends is in sight and aesthetically appealing, so it looks like this: