I thought that when you grew up you changed your name. Carl sounded like a kid's name, so when I was older I thought you chose a more grown-up name like Frank, or Bob or something.
A childhood belief about getting older

others believed things like this
- a friend of my little sister's had 4 older brothers, so she thought that when you got older you grew a penis!Anon
- When I was little I thought grown ups could fly but wouldn't tell me about it or teach me until I got older.— James the Great
- that as I grew up, my parents would "grown down," then I would be the Mom and Mom would be my child.Anon
- I thought that my parents chose my cousins, and was upset when my mother wouldn't let me add one.Anon
- I thought grown ups were born grown ups.— mea
- Because of Pocahontas, I grew up believing Native Americans noises sounded like English to Native Americans.Anon