I used to believe that you changed your name once you became a grown-up because no one I knew had the same name as adults I knew.
A childhood belief about getting older

others believed things like this
- I used to believe that grown-ups were born "grown up" and that I would stay a little kid forever.— Still A Kid
- That adults came into the world as adults and were never childrenAnon
- I thought grown ups were born grown ups.— mea
- That boys turned into women when they became adults and girls turned into men when they became adults. Anon
- I used to think that my teachers knew everything. — Unknown
- I used to believe that all famous people knew each other.— Liz