'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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Twenty nine percent of women spend more time shopping for shoes than they do looking for a life long mate.
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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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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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It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
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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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When dragonflies mate, their tails form a love heart.
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Erotomania is a type of delusion in which the person believes another person is in love with him/her.
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