I used to believe that if you brushed your teeth enough, they would shine so brightly it would cause a supernova and then you could turn into a mermaid. (I was obsessed with mermaids at the time and really wanted to be one.) I spent hours at a time brushing my teeth and got really disappointed when nothing happened.
A childhood belief about special powers

others believed things like this
- My mother told me that the tooth fairy would only come if I brushed my teeth.— Dale
- I used to believe that eating burnt toast would make your teeth whiter and would brush your teeth for you.— Natasha
- 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
- Until I was about 8 I believed that your back teeth keep growing in until you have a full circle of teeth.Anon
- When I was very young, I assumed that false teeth were taken from dead people's teethAnon
- Until I was around 8 or 9 years old, I thought dentists took your teeth out and replaced them with new teeth.— Verapamilo