I agree with coaster. You don't often hear cats meowing to each other. They usually meow to or at humans and it starts as a conditioned response. "Oh, THAT worked (got me food, petting, toys, any desired attention) --- I'll have to remember that!"
Before you criticize someone, you should walk a mile in his shoes. That way, when you criticize him, you're a mile away and you have his shoes.