First, hes only there cos you feed him. Second he licks you to stimulate you like a mother for food. Feed me. He wags his tail for many many emotional reasons. Dogs that stay cooped up and bark at everyone going past tend to be nervous of everything and anything. Flighty fighty dogs, that should not be scared of every little thing walking past the gate.
Try watching this dear. Find out why he is aggressive. I like watching Dog Whisperer!
http://www.youtube.com/watch?v=f6ru7QLEYD4
