Before my grandma told me about the birds and the bees, I believed that babies were born wrapped in blankets. I got this idea from watching shows where a female character was having a baby. They never showed the icky stuff, they would always cut to the the woman holding the baby wrapped in a blanket. So....that's how I got the idea that babies were born with blankets.
A childhood belief about reproduction

others believed things like this
- That because Gerber Baby Food had a baby on it real babies were put in there. Thanks a lot cousin!— Nicole
- I believed that women who wanted babies ate a seed, which then grew into their baby. — World's Worst Scientist
- I used to believe that babies were born out our bellybuttons.Anon
- I don't know why, but I used to believe that babies were one year old when they were born o_O.Anon
- I used to believe that babies were born through the mom's mouth.
Don't know how I came up with that. — Makenna - I used to believe babies were born with clothes onAnon