I’m Spanish speaker and I was until I was 35 y/o. When I was kid my parents never explained to me the meaning of some bad words but they told me they were bad words and as I heard them all the time with out understanding what they were talking about, I thought anything that I couldn’t understand was bad, at the same time the Beatles song became so popular on the radio and I was convinced that people liked to sing bad word songs.
A childhood belief about swearing

others believed things like this
- My parents used to have an old radio. I thought it could only play old songs, like from when they were young.— kathy
- when i first heard the name "blow job",i thought the meaning of that word was blowing a snot out of your nose.— myuka
- I thought the word economical was actually two words: eek and omical.
— Nancy M. - When I first heard the words "flea market", I actually thought it meant "selling fleas".Anon
- I used to believe that the words Angliphile and Francophile were related to the word paedophiles.Anon
- When I was young, I heard the word 'minion' for the first time and thought it was a miniature onion.— Karin