I am able to grow dark facial hair on chin and and patchy facial hair on mustache area, but I cannot yet grow a full face of hair. My father has a full face of hair and I assume It will kick in full-time in the coming years. My question is, if I had this delayed facial hair growth, does this mean that the rest of the face is also still growing? I've read that chewing hard gum and clenching of jaw muscles and lead to bone restructuring and create things like longer ramus and more squaring of the jaw. Is this true for my age or at all?