Men's Body Language, Decoded: What's He Really Telling You?

"This is a sign that he wants to touch you and get close but needs an excuse to do it," says Tracey Cox, author of Superflirt. Just be wary, warns Wood: "If he grimaces while he does it, it shows the need to have things correct or perfect." And be aware of your own reaction to this body-language cue. "It's a direct way for him to say, If you smile, I know you like me back,'" explains Kevin Hogan, Psy.D., author of Irresistible Attraction: Secrets of Personal Magnetism.