Superstition supersmichon

Okay, so She who shall not be named has a bit of a weird superstition. She makes me (and indeed everyone else) cover our heads when we walk under signs. Apparently not doing this brings bad luck or death to everyone present. I've been dubious about this one since I heard about it and I've been doing a little research. I can not find any trace of it anywhere, not a mention, no hints, nothing. I'm destined to look a fool everytime I pass under a sign in her presence and I still have no idea why.

I've never seen the point in superstition really. Sure you shouldn't walk under ladders, but that's a health and safety issue above anything else. And yeah, new shoes shouldn't go on a table, neither should old shoes, or indeed any type of shoes 'cos it's just plain unhygienic. Black cats, crossed cutlery, broken mirrors? Why attribute something totally unrelated with these things? Why explain your life away to something you can't prove? Of course that could bring us back to religion...but that's one long ass bag of worms for another time.