When I was around 3 years old, I was sitting in my high chair eating lunch when I said to my mum, "I hope you didn't hurt me", and kept on eating.
She asked what I was talking about, so I proceeded to say to her that if I came from her tummy, she must have eaten me, so I hoped that she didn't hurt me while eating me.
My mum had to try very hard to keep from laughing... after that, she proceeded to explain the basic mechanics of reproduction to me. I wasn't very interested at the time, but I have never had misconceptions about reproduction since, and I was able to clarify some very creative ideas my school friends had gotten into their heads upon attaining school age.
A childhood belief about reproduction

others believed things like this
- I used to believe eating fish enables me to live underwater and eating veggy makes me prettier!— Melody
- My friend believed that eating bread crusts or eating mustard will give you curly hair.— Linda from Southern California
- When asked why he didn't finish eating the crust from his pizza, a young friend said "I don't eat the bone".— Dustin
- i used to think that you would die if you didn't wait 30 minutes to go into the pool after eating. (^^)— cady
- I didn't mind eating lambs brains when I was a kid because I thought it would make me smart.Anon
- When I was young, I thought that rice was actually ants eggs! Didn't stop me from eating it though (: -@— Doh!