'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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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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Couples' personalities converge over time to make partners more and more similar.
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Cuddling (or other ‘love’ acts) helps to heal physical wounds faster due to the release of Oxytocin which is proven to reduce swelling.
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40% of people who are rejected in romantic love slip into clinical depression.
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If you mouth the word "colorful" to someone, it looks like you are saying "I love you".
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Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
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