Sea otters hold hands while sleeping so they don’t drift away from each other.
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Two in five people in the world marry their first love.
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In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
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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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Close to 110 million roses (mostly red) will be purchased and delivered around Valentine's Day in the U.S.
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The average person will go on a date at least 100 times before they finally marry.
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In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
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