Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
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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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Two in five people in the world marry their first love.
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Studies show that the risk of a “secret love” being revealed heightens romantic feelings for the partners, thanks to increased levels of phenylethylamine (PEA).
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Kissing an infection-free partner is good for your teeth!
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In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
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