I used to think the song "Blow,blow Seminole wind" was "blow,blow seven old men"(I didn't understand oral sex then).Also I used to HATE listening to Happy Birthday when I was little,so all the pictures of my childhood birthdays portray me with my hands over my ears.
A childhood belief about misheard lyrics

others believed things like this
- I used to think that if you didn't blow your nose and just sniffed the snot up, you head would blow up.Anon
- The trees moving made the wind blow.— little jimmy
- When I was a kid, I used to believe that windmills were what caused the wind to blow. silly me :)— Adrian Z. Ontario, CA USA
- I used to believe that the trees moving caused the wind to blow.— naomi
- If you pull a funny face, the wind will blow and it will get stuck.Anon
- I use to believe that the trees caused the wind to blow by swaying back and forth, like a chinese fan. — Jason Blanchette