In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
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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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There's a love mattress that is specifically designed for couples who sleep on each other's arms.
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The average person will go on a date at least 100 times before they finally marry.
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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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Wearing red increases attraction.
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People are more likely to tilt their heads to the right when kissing instead of the left (65 percent of people go to the right!)
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Historically, sweat has been an active ingredient in perfume and love potions.
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