I used to think that when people say "bless you" after you sneeze they were saying "bleshoo". I believed this for a very long time and I had no idea what it meant but I always said it when someone sneezed just to be polite. :-)
A childhood belief about speaking

others believed things like this
- I used to believe that "God bless you" was "gableshu," so everytime someone sneezed, I would say "gableshu."— JS
- I used to believe that when I said my prayers, "God Bless..." meant please keep burglars awayAnon
- I used to think that foreign people coughed and sneezed in a different language.— Even more stupid
- I was told in first grade that if you fart burp and sneeze at the same time you would blow up— bob doodle
- when i was little i used to beleive that if i coughed, sneezed and farted at the same time i would blow up— fart
- I also thought that people in different countries coughed, sneezed, laughed, or cried in their own language!— Mini