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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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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Two in five people in the world marry their first love.
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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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Raj from the Big Bang Theory is married to Miss India.
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A Korean man called Lee Jin-gyu fell in love with his large, huggable pillow and married it.
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Parents receive 1 out of every 5 Valentines.
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