My dad got the most post in our house (mainly bills of course!) and it all came in those plain white envelopes with the plastic window so you could see the printed address. I therefore believed all post I sent got changed into those envelopes at the post office, so refused to use a letter writing set with pictures on the envelopes when I wrote to my grandma in Australia.
A childhood belief about around the house

others believed things like this
- I thought that blackmail meant sending black envelopes to people.Anon
- I used to believe viagra was a mint and that it was an everyday mint you could buy from the post office!!!— Bartoner
- I used to think "A.M." and "P.M." meant "After Midnight" and "Post Midday".Anon
- I used to believe that the Gettysburg Address was the mailing address of the White House.Anon
- i used to think that the world used to be black and white, cos that's what grandma's pictures showed me...— bgumm
- I used to believe that when people wrote in cursive, they were writing in Spanish.— Ellen