When dragonflies mate, their tails form a love heart.
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In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
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Studies show that the risk of a “secret love” being revealed heightens romantic feelings for the partners, thanks to increased levels of phenylethylamine (PEA).
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Gary Kremen, founder of match.com, lost his girlfriend to a man she met on match.com.
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Parents receive 1 out of every 5 Valentines.
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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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Kissing an infection-free partner is good for your teeth!
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