I always believed that having your dome light on in the car (while driving at night) was illegal. It was only a few months before my TWENTIFITH birthday that I realized it was a lie that my parents told us - I guess we asked them to turn it on one too many times during car trips! Scary how we believe everything our parents tell us as if it's gospel.
A childhood belief about police

others believed things like this
- On family road trips, my parents always told me that water towers were filled with chocolate.— Edith
- My parents have the same birthday -- month, day, and year. I though all mom's and dad's had the same birthday.— Cait
- I thought driving while having to pee was illegal.Anon
- I used to believe your parents PICK your birthday.— Stella
- My birthday was on a different day every year, assigned by my parentsAnon
- I used to think that your birthday changed every year, and that your parents just decided what day it was.— Daniel