My Mother was pretty buxom when I was a child, and as was the fashion in the 50's, she wore low cut summer dresses that displayed a generous display of cleavage.
I asked often "where did I come from", all the while being pretty sure that babies originate in their mummies tummies, since an Aunt was pregnant.
How did they get out, was the question?
The little engineer in me for lack of better data, surmised that they must emerge kicking and screaming one day, from that bottomless cleavage.
A childhood belief about giving birth

others believed things like this
- I used to think my grandmother had two, shall we say, back ends. I didn't realize the second one was cleavage.Anon
- when i was younger i thought that babies could see out of the mummies belly button— strawberry
- I USED TO BELIEVE THAT IF YOU STARED AT A PERSON, THEY COULD NOT TELL YOU WERE STARING AT THEM. PRETTY STUPIDAnon
- i use to think boy geroge from the culture club was a pretty woman.— toe
- My mom used to think "preschool" was called "pretty school" until a few years later.— Molly
- Looking back at it, the belief that dogs eat cats is a pretty funny idea. I used to believe it myself.Anon