Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
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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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Wearing red increases attraction.
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The average person will go on a date at least 100 times before they finally marry.
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It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
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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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40% of people who are rejected in romantic love slip into clinical depression.
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In 1999, a fisherman found a love letter in a bottle from a soldier in WWI. He returned said letter to the now deceased widows 86 year old daughter.
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