My parents happen to have the same birthday. All through elementary school, I thought you could only marry someone who had the same birthday as you. I was crushed when I discovered the boy I liked in fifth grade didn't have the same birthday as me!
A childhood belief about marriage

others believed things like this
- My parents have the same birthday -- month, day, and year. I though all mom's and dad's had the same birthday.— Cait
- I used to believe that on your birthday, you didn't advance to your next age until you ate your birthday cake.— Casi
- Up until I was almost 11, I thought that a birthday suit was a special outfit you wore only on your birthdayAnon
- I used to think that a birthday suit was a special outfit you wear on your birthday— Bri
- I thought you didn't have to go to school when it was your birthday.— M_1
- I used to believe your parents PICK your birthday.— Stella