What were some things that your parents have told you that doesn't make any sense at all? ie. beliefs, superstitions, etc.
My mom always told me to never sleep with my hair wet because I could get a headache the next day. NOT TRUE.
She told me not to walk out in the cold with wet hair because I could get a cold/fever.
Oh, a friend of mine told me that her mom told her that she had to have a shower before ironing.