I wasn't even a small child anymore (around 12-13?) when I used to believe that there was a woman with a very annoying high-pitched comic voice in The Smiths, because of the background singing in 'Bigmouth Strikes Again.'
(I later found out it's actually Morrissey's own altered voice.)
A childhood belief about songs

others believed things like this
- I used to believe the angels were in the speakers at church because of the loud female voice singing.Anon
- i didn't beleive this, but a kid my sister knew thought if he screamed in a really high voice, he ran faster.Anon
- That if a pig loses its voice, it's disgruntled.Anon
- I used to sing at the top of my voice "OLD GIRLS JUST WANNA HAVE FUN"— claire
- When I was a kid I though facial hair on a man is what gave them the deep voice — Adrian Z.
- I used to believe the voice sped up at the end of ads was really just the world's fastest talker.Anon