Thanksgiving turns out to be a fine time to sketch faces. You have a wide variety of models, they are all in a confined space, they are properly tranquilized by large amounts of heavy food. They cannot run away from you. They are related to you, and therefore required to put up with you furtively glancing at them every few seconds while saying nothing. Ideal situation, really. Even the pets are more likely to stand still for you, being that you have access to all the leftovers and they do not.