There seems a symbiotic relationship between humans and dogs, one going back further than any other species relationship we’ve had, as far as mutual dependence. We’ve breed dogs to suite our needs, not the reverse, but many of us do seem to have a great need for a 4-legged creature that’ll respond so quickly to us, and which seems(?) to really “care” about us as individuals. Yea, right, I feed, water, pet, sleep, warm, medically care for, etc etc while she does nothing but, well, what she does: look at us, attend to our every move; wiggle when she’s petted…she earns not a dime and costs us hundreds a year; but neither of us would elect to not have her. Clever little symbiot, or parasite.