Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
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Gary Kremen, founder of match.com, lost his girlfriend to a man she met on match.com.
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Men who kiss their wives in the morning live five years longer than those who don't.
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For Valentine's Day 2014, an unnamed man sabotaged a special screening of "Beijing Love Story" at a Shanghai cinema by booking every other seat, subsequently preventing couples from sitting together.
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In medieval Italy, if a man was caught kissing a woman in public, he had to marry her whether he liked it or not.
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A poll has found that computer 'nerds' make the best lovers, with 82 percent of IT geeks claiming they put their partner's pleasure above their own.
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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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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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