'X' became symbolic for a kiss because in the middle ages when alot of people were illiterate and they used to sign documents with an X and then kiss it for sincerity.
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People are more likely to tilt their heads to the right when kissing instead of the left (65 percent of people go to the right!)
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When dragonflies mate, their tails form a love heart.
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Holding hands with someone you love can alleviate physical pain as well as stress and fear.
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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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Two in five people in the world marry their first love.
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Sandy, an African Penguin, has been in 'love' with her keeper at the Nuremburg zoo since 1996.
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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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