I used to think the store WHSmiths (pronounced double u H Smiths) was called Wuh-smiths. I always wondered where my parents meant when they were talking about going to "double u H Smiths".
A childhood belief about going shopping

others believed things like this
- Some sport cars have a double exhaust. I wondered why. Why would people want to pollute twice as much?— F*ck the environment?
- I used to believe that the solid double yellow lines on highways were the motorcycle lane.— jeech
- I believed that the gap between the double yellow lines in the road was a special lane for motorcycles.— Joel
- When I was little i thought lb for pounds was pronounced lubs, and i called them that for 2 years. Anon
- When I was a kid, I wondered why they called it "public hair" when it was so private.Anon
- Until about age 9, I thought there was a country called "Operaland" where everyone sang instead of talking.Anon