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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Holding hands with someone you love can alleviate physical pain as well as stress and fear.
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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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The average person in their lifetime will spend an estimated 20,160 minutes kissing!
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If you mouth the word "colorful" to someone, it looks like you are saying "I love you".
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Parents receive 1 out of every 5 Valentines.
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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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