When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
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The average person in their lifetime will spend an estimated 20,160 minutes kissing!
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Raj from the Big Bang Theory is married to Miss India.
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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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Holding hands with someone you love can alleviate physical pain as well as stress and fear.
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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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