Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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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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Two in five people in the world marry their first love.
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It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
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In 2010, Gary Richmond was beaten into a coma. He woke up with amnesia and no memory of his wife of 20 years. Subsequently, he ended up falling in love with her all over again!
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'X' became symbolic for a kiss because in the middle ages when alot of people were illiterate and they used to sign documents with an X and then kiss it for sincerity.
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When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
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When dragonflies mate, their tails form a love heart.
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