i used to believe that the term "sleeping together" really meant that they slept together, as in fell asleep at the same time and that's how women got pregnant, I could never figure out how the whole penis in vagina thing worked while you were snoring away...
A childhood belief about reproduction

others believed things like this
- I thought if someone worked full time it meant they worked 24/7 and never did anything else!— andalite
- I used to belive that employees who worked at 24/7 shops lived there and never slept!(they worked 24/7)— tilly Waukesha WI
- I thought the term maiden name actually applied to women who were maidens.— Natasha
- 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
- i used to think that having sex was licking the persons vagina or penis until u got tiredAnon