Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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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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The average person will go on a date at least 100 times before they finally marry.
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The left ear is more responsive to words of love and emotion whispered into it than the right.
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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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Couples' personalities converge over time to make partners more and more similar.
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Wearing red increases attraction.
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