In medieval Italy, if a man was caught kissing a woman in public, he had to marry her whether he liked it or not.
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Brain scans show that people who view photos of a beloved experience an activation of the caudate - the part of the brain involving cravings.
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It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
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In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
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The average person will go on a date at least 100 times before they finally marry.
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Close to 110 million roses (mostly red) will be purchased and delivered around Valentine's Day in the U.S.
88
Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
14
Wearing red increases attraction.
30