Willett WC, M.D., David S. Ludwig DS, in an article titled ‘Milk and Health’ published in ‘N Engl J Med 2020; 382:644-654 opined that "Among men, milk intake during adolescence was linearly associated with a 9% greater risk of hip fracture later in life for every additional glass consumed per day. No association with the risk of hip fracture was seen among women." What could be the possible explanations?