I did not believe in the stork; I knew that women got pregnant for 9 months, then gave birth in the hospital. I did not know how the baby got there in the first place. I believed that when a couple got married, the wife would "automatically" become pregnant.
I also thought the baby would leave the mother's womb through her butt. ;)
A childhood belief about reproduction

others believed things like this
- Until I was five, I used to think that women gave birth to baby girls and men gave birth to baby boys— Cassidy K
- when i was 5 years old I thought that a pregnant women deliever the baby by vomiting it — Nesreen Tashkandi
- When I was little I used to think that as soon as you were married the woman automatically got pregnant.Anon
- I used to believe that after 9 months, mothers went to the hospital to buy a baby off the doctors.Anon
- I used to believe that women could only get pregnant once they were married and it just sort of happened Anon
- When I was younger I used to believe that women just magically got pregnant after getting married.Anon