Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
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Holding hands with someone you love can alleviate physical pain as well as stress and fear.
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Sea otters hold hands while sleeping so they don’t drift away from each other.
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Two in five people in the world marry their first love.
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Close to 110 million roses (mostly red) will be purchased and delivered around Valentine's Day in the U.S.
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In Korea, there's a man named Lee Jin-gyu who fell in love and married his life-sized Japanese body pillow (called a "dakimakura").
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