You mean aside from the obvious thing that it teaches the puppy? Man-handling the puppy...grabbing the paw, grabbing the cheek, grabbing the mouth....getting rougher.... is not what you want the puppy to learn. Puppies bite as a form of play. You can take several other approaches...continue to play but, show the puppy what he can bite on....a squeaky toy or a Kong are better substitutes than your hands.
You can leave the room....his playmate leaves. When you come back chances are he'll try something different...anything besides biting gets rewarded/encouraged (unless he's now chewing the couch).
You can leave the room....his playmate leaves. When you come back chances are he'll try something different...anything besides biting gets rewarded/encouraged (unless he's now chewing the couch).