Luke was a natural in front of the camera and I actually (playfully) yelled at him for not being a high school senior model for me this year.  What made it even a better session was he was having fun with it.  I talked him through at the beginning and of course would still direct him every once in awhile, but he just got it.  I always tell my seniors when I first start to photograph them that if they want to move they can, if they want to stop smiling, they can.  It doesn't have to be so stiff and they certainly do not have to wait for me to tell them what to do.  Most of the time, I am constantly talking and giving direction which is my job - but sometimes you just get a high school senior in front of you that just knows what to do and isn't afraid to show you.