I grew up on a farm, so I was familiar with crop farming and gardening from an early age, but had absolutely no concept of sexual reproduction until much later. As a result, when I was 5 or 6 and overheard my Mother explaining to my older sister how "the man's penis fertilizes the seed," I remember picturing a penis wearing a hat and deligently using farming tools. My sister immediately chased me away when she saw that I was intruding on their "private" conversation, so I missed hearing the rest of the lecture and was left with that absurd image in my head for years.
A childhood belief about reproduction

others believed things like this
- a friend of my little sister's had 4 older brothers, so she thought that when you got older you grew a penis!Anon
- I used to think that Frankie Avalon sang, "Hey Penis, Oh, penis..." instead of "Hey Venus."Anon
- We use to think the male organ (penis) was called a PUDDLE....
My twin sister and I both called it that...Anon - I used to believe that when a boy was curcumcised they cut off one penis, which is why I only had one left.— whoops!
- I used to believe that gay sex involved a man sticking his penis inside another man's penis.Anon
- i thought getting circumcised was to get the head of the penis cut off— Dee