Just before the photo is shot, Ms. Yang makes sure her shoulders are pushed back and just very slightly tilts her head down, "which gives you a very nice line, " she says.

WSJ: Tricks of the Trade: How to Look Good in Photos

If he is moving his head and body away from you, even slightly, that may be a sign that he is closing down.

FORBES: Body Language Quick Takes #2: How to Spot Someone Closing Down