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Brad Pitt and Angelina Jolie
Lingering eye contact – Call it "stargazing," if you will. Although many of our favorite red carpet walkers are actors by trade, they're not faking it when they stare into one another's eyes, a la Angie and Brad. "If you see celebrity couples looking right into each other's eyes, it's a sign of tenderness and affection," explains Dr. Lillian Glass, renowned Body Language expert. "You can feel the love between them." Research proves it: A study in the journal Archives of Sexual Behavior proved that the longer a man's gaze rested on a woman, the more interested he is. Men made eye contact with the women they found attractive for an average of 8.2 seconds.