me and my sister used to fold up our top lips, showing our teeth. My mum used to tell us not to do this because its what animals do when they mate!
A childhood belief about general

others believed things like this
- I used to beleive that (like your teeth do) your lips would fall off so new ones could grow.— Queen Ohla Quads
- When I was little I believed that when I put lipstick on my lips, the lips grew.— Alba Águila Castelló
- 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