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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Studies show that the risk of a “secret love” being revealed heightens romantic feelings for the partners, thanks to increased levels of phenylethylamine (PEA).
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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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Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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Couples' personalities converge over time to make partners more and more similar.
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Men fall in love faster than women do.
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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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Two in five people in the world marry their first love.
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