Jack is slow and careful about it, at least. He reaches over and gently puts his hand on Levi's shoulder, testing the feel of the fur there. "I think a good way to start," he suggests, hand still on the fur, not quite petting but not exactly still either, "would be to think about what it feels like to be human. No fur, two legs, smaller ears, thumbs... the way it's different from this. Yes?"