Since lions and tigers are larger versions of cats, I used to believe bears were large dogs
A childhood belief about cats and dogs

others believed things like this
- I used to believe that lions married tigers. Anon
- I used to believe that tigers were girls and lions were boys— Ruth
- I used to think that all lions were boys and tigers were girls.Anon
- 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