Why people believe in the unbelievable?

Guys, are you agree that almost everyone has few superstitions about something? I think it's true and superstitions are an important part of our culture heritage. Behind many holiday rituals you can find ancient beliefs. I doubt that superstitions sometimes contain truths handed down from the past. In East Europe, it's customary to smash the glasses after you give a toast to the bride and groom. Some people believe it will bring happiness to their marriage. Also looking into a broken mirror will bring bad luck. In my country many people believe that if you drop a coin into a fountain on your honeymoon you can ask for a wish to comes true. When you get merry at the courthouse you should enter a place using your right foot to have good and long life together. Another beliefs in some cultures say that if someone passes a broom over your feet, you will never get married. Do you believe in any of them?