I once told my younger sister when I was about seven that if you smile at a dog, it thinks you're frowning at it and if you frown at it, it thinks you're smiling at it. She went around frowning at our dog for years.
A childhood belief about cats and dogs

others believed things like this
- My brothers friend still thinks he will be a kangaroo when he grows up and he's 9!!!!!— Jane Rom
- My five-year-old cousin thinks that his parents purchased him from Wal-Mart.Anon
- My 6 years younger sister used to tell me that I was younger than her. She was just growing backwards.— Taryn
- I was told as a young child that if I didn't smile going past the police station, I wouldbe arrested.Anon
- I used to believe that England was shaped like a Sewing Machine Box, Germany was a Smiling Sun. Anon
- I used to believe in my imaginary friend dooodle.
Doodle was a stickperson and was always smiling.— Samantha