Close to 110 million roses (mostly red) will be purchased and delivered around Valentine's Day in the U.S.
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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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Gary Kremen, founder of match.com, lost his girlfriend to a man she met on match.com.
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Holding hands with someone you love can alleviate physical pain as well as stress and fear.
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40% of people who are rejected in romantic love slip into clinical depression.
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Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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