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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Men fall in love faster than women do.
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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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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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Holding hands with someone you love can alleviate physical pain as well as stress and fear.
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In 2012, a Chinese man named Xiao Fan had a dress made out of 9,999 red roses for his girlfriend and then proposed - 9 in China means forever
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Men who kiss their wives in the morning live five years longer than those who don't.
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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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