Brain scans show that people who view photos of a beloved experience an activation of the caudate - the part of the brain involving cravings.
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In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
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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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The single biggest predictor of love is proximity.
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The average person will go on a date at least 100 times before they finally marry.
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A man's beard grows fastest when he anticipates sex.
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Kissing an infection-free partner is good for your teeth!
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Close to 110 million roses (mostly red) will be purchased and delivered around Valentine's Day in the U.S.
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