I never heard the word 'crap' until I was 18, when a group of workmates were discussing a boozy night out.
They roared with laughter as one of them described crawling drunkenly under some bushes for what I heard as a 'crab'.
Why, I wondered, would he go in the bushes for a crab, and why would one be there, and how would he know anyway, and what use was a crab to a drunk?
Puzzled me for a very long time, that one.
A childhood belief about swearing

others believed things like this
- When I was young, I heard the word 'minion' for the first time and thought it was a miniature onion.— Karin
- In first grade, I thought that if I've never heard of a word before, then it wasn't a word.— Destiny
- When I was a kid I heard that the Beatles did acid and I wondered if they melted from it.Anon
- I used to think that fart was a bad word and then i heard my mom say it once and I was so shocked.— Tara
- I thought the C-word was crap.Anon
- when i first heard the name "blow job",i thought the meaning of that word was blowing a snot out of your nose.— myuka