Ten seconds of hugging a day increases levels of oxytocin, which can reduce blood pressure, thus cutting the risk of heart disease.
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A Korean man called Lee Jin-gyu fell in love with his large, huggable pillow and married it.
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Wearing red increases attraction.
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Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
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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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When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
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