Beliefs are a funny thing. I once believed, like many others, that a black cat crossing your path was bad luck. Of course I was rather biased, because of the unfortunate Panther attack. Nowadays I am older, wiser, and stay out of the big cat enclosure at the zoo.
Growing up I can recall Gypsy women in the street selling ‘lucky Heather’ (although Heather didn’t seem to feel it was so lucky, based on her expression) and some kids in my class had ‘lucky’ rabbit’s-foot keyrings – yuck.
Sports people are notoriously superstitious and many players and fans apparently wear the same ‘lucky’ socks, shirts or underpants to a match, imagining that this somehow mysteriously influences the outcome.