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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One in five long-term love relationships began with one or both partners being involved with others.
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Historically, sweat has been an active ingredient in perfume and love potions.
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In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
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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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Speed dating was invented by a Rabbi in 1999.
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In Korea, if you do not receive any gift on Valentine's day then all the singles go to Korean restaurants and eat black noodles to celebrate (or mourn) their single status.
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