1) Cats do what they want.
2) They rarely listen to you.
3) They're 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 every whim.
7) They're moody.
8) They leave hair everywhere.
Conclusion: They're tiny women in little fur coats.