I used to believe that the words to Tom Jones - Sex Bomb was actually Sex Pot. I know the words don't sound the same but if you listen to the song, it really does sound like sex pot
A childhood belief about misheard lyrics

others believed things like this
- I used to believe that all four-letter words are bad words.Anon
- I used to believe that you could only play a record once, and after that all the sound was wiped off.Anon
- I used to beleive Euthanasia was a country. It does sound like one don't you think?— Charley
- I used to believe thunder was the sound of God rearranging his furniture.Anon
- I used to think that the sound after the toilet was flushed was ladies singingAnon
- When I was a little girl I used to believe cats were broken because of their moter sound when they purr— Shaune F.