Neither can balance a chequebook. You can never tell what either of them is thinking. Women look good in sweaters. Women leave the room to fart. Dogs miss you when you're gone You never wonder whether your dog is good enough for you.
Dogs feel guilty when they've done something wrong.
Dogs don't brag about whom they have slept with. Dogs don't criticize your friends. Dogs admit when they're jealous. Dogs are very direct about wanting to go out. Dogs don't feel threatened by your intelligence.