Funniest post so far.
Neil, your jaw has more to do with bone structure than musculature. Tell me the truth, do you think you can significantly hypertrophy your jaw muscles in order to get a more masculine look? If so, we'd have lolitas with manly, powerful jaws by the handfuls. I can't imagine the Olsen twinc would look too good after a few bouts of Jaw work grin
Your jaw is affected mostly by your hormone profile while growing up. High Testosterone and HGH concentrations lead to a more manly look, but again, there's too many genetic variables that come into play. Whatever effect you can get from working your jaw, lol, should not yield any considerable effect.
For the love of god though, dont try it.