I used to believe that if a dog stuck their tongue in your mouth, you would get worms no matter what.
A childhood belief about cats and dogs

others believed things like this
- I used to believe that when you died no matter what your tongue hung out the side of your mouth. Anon
- I used to think that all people closed their eyes and stuck their tongue out when they died.Anon
- that if you stuck out your tongue at your mother, your hand would stick up out of the grave when you died.— Elaine. London
- I always thought that the gummy worms were real worms that had been mummified— The Ice Cream Sandwich Monster
- I used to believe that my name meant tongue. strange? I think so — Bella
- I use to believe that if you told a story/lie you would get a bump on your tongue.Anon