Close to 110 million roses (mostly red) will be purchased and delivered around Valentine's Day in the U.S.
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A man's beard grows fastest when he anticipates sex.
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Two in five people in the world marry their first love.
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When you fall in love, that 'high' feeling is caused by a flood of dopamine that is similar to that of cocaine.
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In 1999, a fisherman found a love letter in a bottle from a soldier in WWI. He returned said letter to the now deceased widows 86 year old daughter.
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In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
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Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
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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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