Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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In 2012, a Chinese man named Xiao Fan had a dress made out of 9,999 red roses for his girlfriend and then proposed - 9 in China means forever
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Historically, sweat has been an active ingredient in perfume and love potions.
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It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
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Twenty nine percent of women spend more time shopping for shoes than they do looking for a life long mate.
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Men who kiss their wives in the morning live five years longer than those who don't.
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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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Couples' personalities converge over time to make partners more and more similar.
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