I used to think that the umbilical cord went from a baby's genitals to the mother's belly button, not vice versa.
A childhood belief about reproduction

others believed things like this
- when i was little thought that ants changed traffic lights from green to red and vice versa.Anon
- i used to believe when you had a baby it would come out of the belly button— cortni
- i used to believe that when you pushed your belly button a baby would pop out im now 14 and know the truth — kelsey
- I used to believe that when a woman was pregnant, she fed the baby with a tiny spoon through her belly button.— Marie
- I used to think that babies were made when you press your mums belly button.
Then a baby would fall out— Chris Hyndman - I used to believe that a woman gave birth by pressing her belly button and the baby popped out.
— Tasha K