Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
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Speed dating was invented by a Rabbi in 1999.
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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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In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
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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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When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
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Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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40% of people who are rejected in romantic love slip into clinical depression.
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