When I was little I thought it was literally possible to "waste your breath". Like, you could actually talk too much and would not have any air left for speaking, and you'd not be able to talk again for the rest of your life.
A childhood belief about speaking

others believed things like this
- I used to beleive when ppl didn't talk (deaf ppl) they lost their voice and could never talk again!— Tiara 10
- I thought I had X-ray vision and could talk to animals and they could understand me.— Kitty Lover
- I used to talk with my teddy bear and I really thought he answered me.— Joy
- I used to believe that people who were speaking foreighn languages were just speaking gibberish.— Zoe
- when I was 6, I believed I had to go to school for the rest of my life— Cody Jarosinski
- I used to believe that I could talk to nature. I still do. And I'm 12. — Judy