My sister was convinced of an intricate baby-making process: the prospective mother and father would go into a room, lock the door, and stay awake all night completing a 2-dimensional puzzle of a baby (which they had bought from a special baby store). At the end of the night, the mother would eat the puzzle, and it then took 9 months for the 'puzzle baby' to become a 3-dimensional real baby, at which point the mother would give birth.
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
- 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 little I believed that the mother vomited the baby. Anon
- I used to think that to give birth, a woman had a slit cut into her inner thigh, and the baby would come out.Anon
- I thought my neighbor breastfed her baby because they were too poor to afford baby bottles. Maybe they were!— Kristen
- on "highway to hell" i always thought it goes "baby see, baby do" instead of "hey satan, payin´ my dues"— Miss Understood