My voice used to be kind of deep for a girl, I'm something of a tomboy, and I've always had swimmer's shoulders, so I started to suspect that the doctor had made a mistake and that I was secretly a boy.
I eventually asked my mother how she knew I wasn't a boy. She wouldn't elaborate any more than, "I just know," so I remained suspicious for quite some time.
A childhood belief about rude bits

others believed things like this
- When I was a kid I though facial hair on a man is what gave them the deep voice — Adrian Z.
- I used to believe that, in cities, if you dug deep enough in anyone's lawn, eventually you'd hit the concrete.— Kevin Fox
- I used to believe that, in a deep and profound kind of way, the words "door knob" rhymed with "said so". — Katie
- i didn't beleive this, but a kid my sister knew thought if he screamed in a really high voice, he ran faster.Anon
- When I was little, I couldn't understand why people called me a tomBOY, instead of a tomGIRL.— Amanda
- im a girl and i used to think my mom had a penis and i would eventually grow my ownAnon