When I was a kid, my mom used to tell me that dogs & cats ate grass because they were bored. Like so many other things she told me, I believed her until I was an adult and found out other wise.
A childhood belief about cats and dogs

others believed things like this
- My sister and I thought cats and dogs were the same animal, the dogs were male and the cats were female.— Paul
- I used to believe all dogs were male and all cats were female. I still call dogs "boy" and cats "girl." — Kelly F.
- I use to believe that cats and dogs were the same species; cats were girls and dogs were boys.— poopcrystals
- I believed that all cats were female and all dogs were male. — Biologically confused
- When I was a little girl, I believed that all cats were girls and all dogs were boys. :)— Mary Ellen
- When I was little, I believed that all cats were girls and all dogs were boys. Go figure!— Laurie W.