Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
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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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Two in five people in the world marry their first love.
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The typical person spends about 600 hours having sex between the ages of 20 and 70.
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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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40% of people who are rejected in romantic love slip into clinical depression.
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Gary Kremen, founder of match.com, lost his girlfriend to a man she met on match.com.
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