'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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It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
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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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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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Sandy, an African Penguin, has been in 'love' with her keeper at the Nuremburg zoo since 1996.
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Raj from the Big Bang Theory is married to Miss India.
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Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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Men fall in love faster than women do.
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