It's one of the quaint quirks of my childhood... Someone ... I think it was the Grandmother ... once told me that it's bad luck to step on a pavement crack.
I can't recall the rationalisation. Maybe it has to do with karma. And it always better luck to cross the crack with your right leg first rather than the left - something about wishes coming true if you do.
Yes, yes I know none of this makes any sense but there you are ... dusty folklore handed down through the generations was not something to be trifled with.
So there I was as a little kid ... believing just about anything I was told (hey it was the 60s - we respected elders back then - no questions asked) always walking with my head down looking out for cracks in the pavement, adjusting the pace so I'll cross it with the right foot. It must have been a strange sight indeed.
I'm not that conscious about it now but when I do happen to spy a pavement crack up ahead, some primordial instinct kicks in, the stride is automatically adjusted and it's still right leg first.
Hey why tempt fate! Did any of the wishes some true ... come to think of it they all did ... because the only wish at the time was crossing with my right leg first!!