Three men were sitting in a bar by a log fire with their dogs, and they started talking about them.
The first man said, "My dog is called Woodworker. Go, Woodworker!" The dog grabbed a log from the fire and, using its teeth and paws, fashioned a beautiful figurine.
The next man said, "My dog is called Stoneworker. Go, Stoneworker!" The dog dragged a rock from the edge of the fire, and a beautiful carving emerged.
The third man said, "My dog is called Ironworker." He put the fire tongs into the fire until they were red-hot. "Now," he said, "I'll just touch him on the balls, and you watch him make a bolt for the door."