Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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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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There's a love mattress that is specifically designed for couples who sleep on each other's arms.
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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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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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Erotomania is a type of delusion in which the person believes another person is in love with him/her.
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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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Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
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