I used to hear random words and start using them out of context.
For example, my dad did something funny, and I said to my mother, "Dad's such a jerk".
Fortunately I never attempted it with any swear words.
A childhood belief about speaking

others believed things like this
- I used to believe that all four-letter words are bad words.Anon
- On TV game sows when they said the winners were chosen "at random" I thought random was a town.Anon
- My mom used to say that if I said bad words, poop would appear in my mouth— Nina
- I thought "prison" and "prism" are the same words as each other.Anon
- I thought the word economical was actually two words: eek and omical.
— Nancy M. - When i was in kindergarten, i used to think that i invented the words million and billion— Comonsnadama