Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
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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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In Korea, there's a man named Lee Jin-gyu who fell in love and married his life-sized Japanese body pillow (called a "dakimakura").
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Parents receive 1 out of every 5 Valentines.
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8 out of 10 people think that the first kiss indicates how the rest of the relationship will be.
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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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The single biggest predictor of love is proximity.
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