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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Falling in love raises levels of nerve growth in a person's brain for about a year and can improve their memory.
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Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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The single biggest predictor of love is proximity.
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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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Sandy, an African Penguin, has been in 'love' with her keeper at the Nuremburg zoo since 1996.
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Sea otters hold hands while sleeping so they don’t drift away from each other.
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The average person in their lifetime will spend an estimated 20,160 minutes kissing!
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