2) Other people touching my face or my ears
3) When my hands smell like food
4) The words 'moist' (or the german equivalent 'feucht') or 'purge'
5) Cracking/popping knuckles or joints
6) Over-cooked vegetables
7) People leaning over my desk at work
8) Pumping gas for my car (or also, I guess, paying for that gas.)