"This is a gesture that a soft-spoken man may use when he's interested in a woman but needs her to make the first move," says Givens.
"He's showing his vulnerability in order to make himself more approachable and hopefully lure her in." So if that man you've been making eyes with for the last hour gives you the head tilt, that's your cue to go in for the kill and introduce yourself or even send him a drink.
"Before developing speech, we communicated with our bodies," says David B.
Givens, Ph D, director of the Center for Nonverbal Studies in Spokane, Washington.
"We still subconsciously use those instinctive responses to express our feelings." So if you can interpret a guy's signals, it's like having a backstage pass to his psyche. Read on to learn his most-telling moves..how to respond with some undercover communication of your own.