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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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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In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
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It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
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Wearing red increases attraction.
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Historically, sweat has been an active ingredient in perfume and love potions.
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Brain scans show that people who view photos of a beloved experience an activation of the caudate - the part of the brain involving cravings.
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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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