When dragonflies mate, their tails form a love heart.
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In 2010, Gary Richmond was beaten into a coma. He woke up with amnesia and no memory of his wife of 20 years. Subsequently, he ended up falling in love with her all over again!
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Ten seconds of hugging a day increases levels of oxytocin, which can reduce blood pressure, thus cutting the risk of heart disease.
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When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
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It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
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Sea otters hold hands while sleeping so they don’t drift away from each other.
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A Korean man called Lee Jin-gyu fell in love with his large, huggable pillow and married it.
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Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
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