I used to believe that your mouth was like a sponge, and your saliva had sort of a fixed limit. So if you had a mouthful of saliva, and you swallowed it, it was like squeezing all the water from a sponge, and there wasn't any more.
I didn't want to have a permanently dry mouth, so whenever I salivated, I'd hold it in my mouth, wondering why it didn't get reabsorbed...
A childhood belief about general

others believed things like this
- I used to belive that if i put my foot in my mouth, I would get foot-and-mouth illness— Emily Sathrota
- I used to believe that if I didn't brush my teeth at night, ants would crawl into my mouth and eat my teeth.Anon
- I used to believe that a fish cake was a fish in sponge and coated in icing. I believed this until I was 9.Anon
- I used to believe that the foam that sometimes washes up on the beach was shark saliva... — Tiffany
- i used to believe that if you farted out of your mouth, you'd die.— John Deere
- i used to believe that dragonflies would sew your mouth shut.Anon