Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
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Wearing red increases attraction.
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It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
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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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Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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People are more likely to tilt their heads to the right when kissing instead of the left (65 percent of people go to the right!)
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