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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'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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Studies show that the risk of a “secret love” being revealed heightens romantic feelings for the partners, thanks to increased levels of phenylethylamine (PEA).
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Couples' personalities converge over time to make partners more and more similar.
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The average person in their lifetime will spend an estimated 20,160 minutes kissing!
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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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Close to 110 million roses (mostly red) will be purchased and delivered around Valentine's Day in the U.S.
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It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
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