Facial muscular symmetry

I've been paying a lot of attention to symmetry in my body lately.  Primarily, I've been focusing on running symmetrically, and every time I try, I figure out something different, but I digress.

I noticed recently that I don't smile symmetrically.  Maybe it has something to do with trying to master Han Solo's half smile.  But I have a lot more control with the left cheek muscles than the right.  The right can do more stuff if the left is also doing it.  I've also noticed with trumpet playing that the control with the right side is less.........