You burn 26 calories in a one minute kiss.
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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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Gary Kremen, founder of match.com, lost his girlfriend to a man she met on match.com.
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In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
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Kissing an infection-free partner is good for your teeth!
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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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In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
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Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
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