Close to 110 million roses (mostly red) will be purchased and delivered around Valentine's Day in the U.S.
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Ten seconds of hugging a day increases levels of oxytocin, which can reduce blood pressure, thus cutting the risk of heart disease.
26
If you mouth the word "colorful" to someone, it looks like you are saying "I love you".
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Men fall in love faster than women do.
32
Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
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Brain scans show that people who view photos of a beloved experience an activation of the caudate - the part of the brain involving cravings.
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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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When you fall in love, that 'high' feeling is caused by a flood of dopamine that is similar to that of cocaine.
44