When dragonflies mate, their tails form a love heart.
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Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
14
40% of people who are rejected in romantic love slip into clinical depression.
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Two in five people in the world marry their first love.
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8 out of 10 people think that the first kiss indicates how the rest of the relationship will be.
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The typical person spends about 600 hours having sex between the ages of 20 and 70.
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It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
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