Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
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It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
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Two in five people in the world marry their first love.
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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 Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
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A couple had their wedding rings engraved with a waveform of their own voices saying "I do."
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As a rule, 66 percent of people keep their eyes closed while kissing. The rest take pleasure in watching the emotions run the gamut on the faces of their partners.
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