When I was little, instead of getting the 'sex talk' my mum gave me a brief overview and then gave me a book on the subject. I read the word vagina as 'virginia' and for many years I felt very sorry for girls called that because it was a supposedly 'dirty' word (I was a very puritanical little kid).
Years later I found out the real way of pronouncing vagina, but when I was about eleven in a class presentation on sex for some reason I mispronounced it again as Virginia. Took me a long time to live that one down...
A childhood belief about rude bits

others believed things like this
- Until I was ten or eleven I thought a vagina was a "pagina" Anon
- When i was young, I thought being a virgin meant you were from Virginia.— Marcy
- I used to believe that mommies gave birth to girls and daddies gave birth to boys. — Jackie
- I used to believe that women gave birth to girls and Men gave birth to boys— Rob
- i used to believe that a penis was the same as a vagina except really long— *stupid*
- i used to believe that if you have sex for too long, the penis would stay in your vagina— Angela