Why would anyone with common sense have a portrait with their hand under chin? Almost every model and photographer on model mayhem know how to shoot their cameras from the same spot and lighting but no clue on how to pose a model professionally. Models and photographers go to agency ports and copy everyone else who show no common sense. Notice the darkness pn the blouse from poor posing and shooting.
What is the purpose of a model image? What is a client looking for? Answer those questions and you will never be posing like a first day model and photographer again! You see someone doing he hands near the face to shoulder you have your self a beginner model and photographer. We were blessed with massive common sense beside smarts and knew at 3 how to pose models. By the time I was looking at any magazine I knew who was posed effectively and you want to learn as well!
Never do for obvious reasons.