Perhaps the most obvious reason, some dogs simply prefer the companionship of their human owners. Over the process of domestication, natural selection has shaped dogs to become companions for humans. Domesticated dogs are now ‘bonded’ with humans in some of the same ways as children. In this sense, our bond with dogs is one that has evolved over the course of domestications.
If your dog follows you around constantly, you will likely either find it incredibly endearing or you will be tired of almost tripping over him all the time.
Oh my goodness. So sweet and pure.