When I was around six, I asked mom to tell me how babies born. She started to talk about X and Y chromosomes. Until I started to get biology courses I used to believe X and Y are beams emerging from parent's bosom when they started to sleep and I will have one X beam when I will be mother.
A childhood belief about reproduction

others believed things like this
- i used to believe that everyone was born as the opposite sex, and that you changed when you started school.— llama
- i used to believe that the world couldn't have possibly started before i was born.— emma
- when i was little i asked what time midnight mass started.
i honestly had no idea.— what time?? - When I was very little I used to believe that when babies were born they came out of the mother's stomach.— Aerith
- i used to think when it started raining it was god flushing the toilet— edel
- I used to think that raisins were dead flies. I only recently started to eat them again.— Toinette'