I used to believe that when two people got married the wife automatically became pregnant. Like the baby just started growing once they decided to get married. That's because every wedding that I went to as a kid the bride was married. I had no concept of sex back then.
A childhood belief about marriage

others believed things like this
- When I was little I used to think that as soon as you were married the woman automatically got pregnant.Anon
- i used to believe nuns were married to jesus and priests were married to mary.— sunshine
- I used to believe that having children could only happen after a wedding with the person you are married to.Anon
- i used to think that the pope was married but also i thought howcome her wife never appeared on TV— jp
- I believed that when you got married (the wife) you didn't have to work. Boy, was I fooled. ha ha ha— Patty
- I used to believe that a widower was a guy who killed married husbands to make thier wife a widow— Jessica