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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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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According to the New York Times, a study conducted during the 1980's found that men who kiss their wives before leaving for work live longer, get into fewer car accidents, and have a higher income than married men who don't.
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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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When dragonflies mate, their tails form a love heart.
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Men fall in love faster than women do.
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In Korea, if you do not receive any gift on Valentine's day then all the singles go to Korean restaurants and eat black noodles to celebrate (or mourn) their single status.
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