I love your comment on, "Double your pleasure and do both!!!"
Your support information from sources such as Homer himself and Mr. Vardon are more than enough, but I would like to point out when I'm at a PGA golf event live, I'm amazed at how many of the pros heads do not move at all!
Also, Ted Fort's water bottle movie would be very difficult if you had some sway or turning around the base of the neck.
Just some insights from a TGM youngling.