Close to 110 million roses (mostly red) will be purchased and delivered around Valentine's Day in the U.S.
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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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Men fall in love faster than women do.
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Falling in love raises levels of nerve growth in a person's brain for about a year and can improve their memory.
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Wearing red increases attraction.
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Two in five people in the world marry their first love.
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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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Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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