'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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The typical person spends about 600 hours having sex between the ages of 20 and 70.
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It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
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In Korea, there's a man named Lee Jin-gyu who fell in love and married his life-sized Japanese body pillow (called a "dakimakura").
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When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
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Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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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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