And it has a similar effect on the person with you. When you smile at someone, it may fire up a bundle of neurons in the frontal lobe of their brain, triggering happy feelings, says Craig Malkin, Ph.D., a clinical psychologist in Cambridge, Massachusetts. In other words, he could subconsciously start to associate elation with you. Plus, a study published in the journal Psychological Science found that smiling at a person makes you look prettier. Stay with us. Women's Health: 15 Ways To Whiter Teeth
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