'X' became symbolic for a kiss because in the middle ages when alot of people were illiterate and they used to sign documents with an X and then kiss it for sincerity.
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Parents receive 1 out of every 5 Valentines.
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You burn 26 calories in a one minute kiss.
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In medieval Italy, if a man was caught kissing a woman in public, he had to marry her whether he liked it or not.
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40% of people who are rejected in romantic love slip into clinical depression.
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When you fall in love, that 'high' feeling is caused by a flood of dopamine that is similar to that of cocaine.
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In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
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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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