What are CATs?

1. Cats do what they want.
2. They rarely listen to anyone.
3. They are totally unpredictable.
4. When you want to play, they want to be alone.
5. When you want to be alone, they want to play.
6. They expect you to cater to their whims.
7. They can be very moody at times.
8. They leave hair [fur] everywhere.
 
CONCLUSION: They are tiny women in little fur coats. (Source?)

What are DOGs?

1. Dogs spend the day sprawled on a comfortable piece of furniture at home.
2. They can hear a package of food opening half a block away,
 but don't hear you when you're in the same room.
3. They can look dumb and lovable all at the same time.
4. They growl when they are not happy.
5. When you want to play, they want to play.
6. When you want to be alone, they want to play.
7. They leave their toys everywhere.
8. They do disgusting things with their mouths.
 
CONCLUSION: They're tiny men in little fur coats. (Source?)