Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
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Raj from the Big Bang Theory is married to Miss India.
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One in five long-term love relationships began with one or both partners being involved with others.
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When dragonflies mate, their tails form a love heart.
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It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
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Men who kiss their wives in the morning live five years longer than those who don't.
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In 2012, a Chinese man named Xiao Fan had a dress made out of 9,999 red roses for his girlfriend and then proposed - 9 in China means forever
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When someone looks at a new love, the neural circuits that are usually associated with social judgment are suppressed.
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