1. They will never clean up after themselves
2. They will expect you to refill the water and the food.
3. They will nap at will.
4. They will demand pets at will.
5. They will curl up in adorable and distracting poses.
6. They will listen to all your complaints without interrupting.
7. They may jump in front of the webcam when you are on a videoconference and just walk across like nothing's happening.