Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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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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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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Two in five people in the world marry their first love.
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The single biggest predictor of love is proximity.
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In medieval Italy, if a man was caught kissing a woman in public, he had to marry her whether he liked it or not.
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Parents receive 1 out of every 5 Valentines.
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Kissing an infection-free partner is good for your teeth!
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