When I was a kid, fresh bread and milk were delivered (separately) to houses during the night i.e. you woke up in the morning and there they were on the doorstep.
Living in a new suburb which was full of young parents (like mine at the time), when I was in bed, I would often hear babies crying at night.
I used to believe the baker delivered boy babies and the milk-man delivered girl babies.
A childhood belief about reproduction

others believed things like this
- Until i was 7,I believed that the stork actually delivered babies.
I was a very stupid kid....— DumbKid - I used to believe that the Easter bunny delivered the newspaper. — Terisa
- I used to think the person who delivered Chinese food came all the way from China to do it.— Savana
- when i was little i thought that jesus delivered presents on christmas not santa .— gaby
- When I was little I thought that black babies who were breast fed got chocoate instead of white milk.— Susan
- I used to believe that boys had boy babies, and girls had girl babies.
That was when I was 3-7. I'm 15 now.— Stefanie Michelle