Your human walks into the kitchen. Your cat miaows at the door when you go out. Your human puts down a bowl of food for you. The color you turn after finding half a grub in the fruit you're eating. Cats have an infallibe understanding of total concentration - and get between you and it.
Dogs are really stupid.
Cats can work out mathematically the exact place to sit that will cause the most inconveience. One small cat changes coming home to an empty house to coming home. The various quips and quotes here are part of my taglines collection. Man is the only animal that laughs, but when you look at people, it's hard to understand how the animals keep from laughing.