Communication is a matter of two or more beings understanding one another. This can happen in a number of ways. For people, words, tone, and volume all indicate various levels of importance and urgency in a message. In animals body language may be the key indicator. For example, you are clearly eager to have a tug of war with the cat. His turned back and flattened ears may infer that he would rather not engage in that activity. And as you have no doubt experienced on a number of occasions, he has claws and teeth everywhere and is not afraid to use them. I’ll just get the bandages now so not too much blood is spilled on the couch when the inevitable occurs.