It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
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Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
14
Historically, sweat has been an active ingredient in perfume and love potions.
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The average person will go on a date at least 100 times before they finally marry.
33
When someone looks at a new love, the neural circuits that are usually associated with social judgment are suppressed.
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The average person in their lifetime will spend an estimated 20,160 minutes kissing!
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Couples' personalities converge over time to make partners more and more similar.
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In Korea, if you do not receive any gift on Valentine's day then all the singles go to Korean restaurants and eat black noodles to celebrate (or mourn) their single status.
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