Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
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Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
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It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
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When you fall in love, that 'high' feeling is caused by a flood of dopamine that is similar to that of cocaine.
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The average person in their lifetime will spend an estimated 20,160 minutes kissing!
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Twenty nine percent of women spend more time shopping for shoes than they do looking for a life long mate.
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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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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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