When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
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For Valentine's Day 2014, an unnamed man sabotaged a special screening of "Beijing Love Story" at a Shanghai cinema by booking every other seat, subsequently preventing couples from sitting together.
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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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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 single biggest predictor of love is proximity.
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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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Holding hands with someone you love can alleviate physical pain as well as stress and fear.
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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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