When I was very young (less than 10, maybe 6 or 7?) my parents were talking to other adults in the house and they must have been talking about how tired they were. I thought I'd be helpful and popped up with "You should take some laxatives", believing that laxatives would help them relax. Needless to say, everyone was stunned and I felt stupid about this for a long time before I ever actually learned what laxatives are.
A childhood belief about speaking

others believed things like this
- I used to believe that eating chocolate laxatives made you stronger,don't ask me why.— pat
- Until about age 9, I thought there was a country called "Operaland" where everyone sang instead of talking.Anon
- When the police are talking about "rap sheets," I thought that the criminals were making rap music.Anon
- I grew up believing meerkats have human hands because I learned about meerkats from The Lion King.Anon
- I used to believe the people of television were talking to me alone !— Margaux, a French student in eighth grade
- That people older than me knew what they were talking about.— Mark