Riding in the car one day, my husband threw a banana peel out the window - with a look of shock on my face, I turned to him and said "why'd you do that! You're going to cause someone to spin out!"
This is just one of many examples of some of the weird beliefs we tend to carry over from childhood until someone steps in and gently reminds us that this is earth, and whatever planet we came from can be left behind now.
What are some of the ridiculous beliefs you have had as an adult?