When I was younger, I used to think that when little girls were born, a TEENY TINY baby was already in their tummy and would grow up and come out when she was married or in her 20's.
A childhood belief about reproduction

others believed things like this
- I used to think that Pez candy were teeny tiny bath tubs.— Mitsuki
- How could Baby Jesus be born on Dec 25th, get tall, grow a beard and then die, all by Easter. Whew!— Joe
- when I was tiny I thought that before I was in my mum's tummy I was a twinkle in my dad's eye for a few years.Anon
- I used to believe that if I slept on my tummy my boobs would never grow so I never slept on my tummy.— LoLo
- i used to think boys were born from men and girls were born from women— swag lad123
- if you eat a seed, the plant will grow in your tummyAnon