My dad told me when I was really little that roosters simply "walked over" an egg in order to fertilize it. I was recently in a conversation with my boss at work and argued that this was true for at least ten minutes - before realizing that my dad had simply told me that in order to avoid giving me the sex talk! My boss still laughs at me over that one.
A childhood belief about reproduction

others believed things like this
- I used to believe that, if God would die, Santa Claus would be boss.— Judith
- I used to think that in order to have a baby two people needed to kiss for 15 minutes with taking a breath. Anon
- I used to believe the show Law and Order was a gardening show called Lawn and Order.— Adriana
- I used to think that if you met your parents' boss, your parents would be fired!! AAAAAHHHHHHH!!!— Spoot
- My sister thought that she could video me by simply inserting the VHS tape into the VCR sideways.
Anon - I thought that an ambassador was simply someone who wore a tuxedo, top hat, and a monocle, and held a cane.— GE