Somewhere around 1953, when I was 5 years old, a 'friend' told me,"step on a crack, and break your mother's back." Referring to the cracks in the sidewalk. This made a big impression on me and 56 years later I still avoid stepping on cracks in the sidewalk. No exaggeration. I know it is irrational but that is the way it is. I am not particularly superstitious although I avoid walking under ladders. I don't get upset when a black cat crosses my trail or someone puts a hat on a bed or opens an umbrella in the house. Breaking mirrors is a hassle but I don't hold with the 7 years bad luck attributed to that happening. Anyone else have any irrational phobias or superstitions ?