Sandy, an African Penguin, has been in 'love' with her keeper at the Nuremburg zoo since 1996.
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Men fall in love faster than women do.
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In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
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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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Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
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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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It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
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Holding hands with someone you love can alleviate physical pain as well as stress and fear.
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