I used to think that to have a baby, men penetrated the woman's belly button. This was of course done by doing lining up perpendicular to the woman, and doing pushups into her belly button. I also figured that was why we did pushups in school. For training!
A childhood belief about reproduction

others believed things like this
- 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 believe that a woman gave birth by pressing her belly button and the baby popped out.
— Tasha K - When I was younger I thought that when a woman was pregnant she would feed her baby through her belly button!— Hennie
- 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 think that if i touched my belly button it would unfold and my belly would be inside out forever. Anon