Some common stereotypes of these feline friends are as follows: 1. It's not easy to train a cat. 2. A cat can eat a bar of chocolate. 3. It's impossible for indoor cats to become sick. 4. Cats may harm you while cuddling. 5. It's silly to brush a cat's teeth. 6. Cats can live nine years. 7. Cats lose their balance sense without their whiskers. 8. It's good for female cats to give birth before neutering. 9. Cats can eat unhealthy table scraps as much as they want.