Very Superstitious

Why do some people believe in superstition? Do you know what it means when your eye twitch or your foot itch. Some people believe that these are some sort of signs that suppose to mean certain things. Like when your right hand itch it means that money is coming to you. When you mention someone by name by mistake that someone is talking about you. When your nose itches your telling a lie. I really don't believe in superstition but I know that when my eye twitch that something is going to happen but I just don't know if it's good or bad or when it's going to happen. Almost every time that my eye twitch this is the case. So do you believe in superstition and if you do state some of them.