Superstitions are taught to us by others. We pick them up from family, people we know, or those we encounter.
I would never think of myself as a superstitious person, but there are certain things I have to adhere to. My mother was responsible for two of them.
I was attempting to tidy-up my desk recently (don't laugh) when I spotted the above... crossed knives. This was one of my mother's horrors. The lower knife always had to be removed first, otherwise the most dreadful things could happen. I'm sad to say that the tradition continues, and crossed knives, chez Cro, are verboten.
Another of my mother's favourites concerns the 1st of each month. Every 1st, the very first words spoken before getting up in the morning, must be 'white rabbit, white rabbit'. This ensures a happy, productive, and safe, month. It's worked so far!
Otherwise I would never walk under a ladder; but I think of that as common sense, rather than superstition. I would never open an umbrella indoors, and I would also hate to break a mirror.
Do you have any unusual superstitions?