One in five long-term love relationships began with one or both partners being involved with others.
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Two in five people in the world marry their first love.
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When dragonflies mate, their tails form a love heart.
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Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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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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8 out of 10 people think that the first kiss indicates how the rest of the relationship will be.
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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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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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