I remember I used to think that nobody else in the world had the same birthday as me. But then this girl from school told me hers was the same day as mine. I showed lots of excitement when she told me, and later went home thinking that she obviously was lying.(I was about 4 or 5 at the time.)
A childhood belief about birthdays

others believed things like this
- I remember once a friend of mine told me that when ever you hold in your pee it would make your balls stronger— Zao
- I used to think that girls' anuses were green. I remember thinking that as late as high school.— Jack
- I remember a girl in my kindergarten class told me she wanted to be a waterfall when she grew up.Anon
- My cousic used to think he was older than me because his birthday was in June and mine was in December.— //**...Ethan...**\\
- i used to think that the world used to be black and white, cos that's what grandma's pictures showed me...— bgumm
- I used to think my birthday was a national holiday and the whole world celebrated it— アノン