A model is a person who is being looked to by others, or who a certain group of people imitate in many actions or pattern of living. This is built out of admiration for what the model does that's attracts the attention of those who look unto him, they could do this from a distance or when close to the person. Most of what people imitate or model from others could be fashion, lifestyle, career pattern, and many others. Joey imitating his brothers pattern of eating signifies that his elder brother is his model in this particular event.