I used to believe that I was the oldest child. It wasn't because my birthday was earliest in the year (although that is true), it was because on all the TV shows the oldest child is always so much cooler than the youngest, and I thought since I am clearly so much cooler than my older sister, I must be older. Wow, I had a big ego.
A childhood belief about birthdays

others believed things like this
- My oldest sister is 15 years my senior. I used to think that she was older than my mom.— Callie
- I used to think that i was the oldest kid of my family because my birthday came first— The youngest of kids
- One day when I was 6 I learned that the toilet was NOT a water cooler. :/— J.C.
- i thought I got one year older when my family sang the birthday song.— I am the ghost
- I used to believe that adding salt to food will make it cooler.— Ale Nijamkin
- a friend of my little sister's had 4 older brothers, so she thought that when you got older you grew a penis!Anon