I believed that to get pregnant a man and a woman lay next to each other, naked and he puts his thumb in her belly button.
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
- 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 think you had to put it in a girls belly button to get them pregnant.Anon
- I used to believe that a woman gave birth by pressing her belly button and the baby popped out.
— Tasha K - I believed that if you pushed your belly button, your bum would fall off.— Wendy
- I used to believe once a man and a woman lay naked caressing each other, the woman would be pregant— oiman