Dogs are very direct about wanting to go out. Dogs don't feel threatened by your intelligence. You can train a dog. Dogs are easy to buy for. Dogs understand if some of their friends cannot come inside.
Dogs admit it when they're lost.
Dogs are color-blind. Dogs aren't threatened if you earn more than they do. Where Dogs Fall Down Men only have two feet that track in mud. Men can buy you presents. Men don't have to play with every man they see when you take them around the block.