When I was six, I had some cousins whose parents were very strict with them in most everything. I remember saying to them "No way, Jose!" From their reaction, I ended up beleiving the name Jose was an actual swear word for a few years after.
A childhood belief about swearing

others believed things like this
- I used to believe my nieghboor jose invented the language spanish and he got rich and bought cars— Thomas
- i used to think the word "suck" was a swear wordAnon
- I used to believe that bizarre was a swear word.Anon
- I used to believe that “shut up” was a swear word.Anon
- i used to believe that if you said a swear word you would turn into the opposite sex the next day— jess
- My cousin used to think that "body" was a swear word.— Jordan