Dogs never expect gifts. Dogs never want foot-rubs. Dogs seldom outlive you. Dogs think you sing great. Dogs understand that all animals smaller than dogs were made to be wanted.
Dogs understand that instincts are better than asking for directions.
Dogs will forgive you for playing with other dogs. If a dog is gorgeous, other dogs don't hate it. No dog ever put on 100 pounds after reaching adulthood. You never have to wait for a dog. They're ready to go 24 hours a day.