Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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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 in their lifetime will spend an estimated 20,160 minutes kissing!
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A Korean man called Lee Jin-gyu fell in love with his large, huggable pillow and married it.
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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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Couples' personalities converge over time to make partners more and more similar.
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When someone looks at a new love, the neural circuits that are usually associated with social judgment are suppressed.
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Sea otters hold hands while sleeping so they don’t drift away from each other.
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