I used to believe that the only time adults had sex was to have a baby, so in the movies when a prospective father was surprised his wife was going to have a baby, I thought that was really silly. Of course he knew!
A childhood belief about reproduction

others believed things like this
- If a man wore his shirt out, I thought his wife was going to have a baby.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
- When I was 5 I thought that baby boys came from men and baby girls came from women...— Gaz
- That because Gerber Baby Food had a baby on it real babies were put in there. Thanks a lot cousin!— Nicole
- I used to believe that a baby shower was a tiny bathtub with a showerhead just for the baby.— Amy