Parents receive 1 out of every 5 Valentines.
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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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Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
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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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Holding hands with someone you love can alleviate physical pain as well as stress and fear.
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Couples' personalities converge over time to make partners more and more similar.
235
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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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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