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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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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Kissing an infection-free partner is good for your teeth!
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Rex the German Shepherd was a rescue dog with a bad temper. He refused to be fed by humans and would attack strangers, but he’s a changed dog after falling in love with Geraldine the goose!
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The typical person spends about 600 hours having sex between the ages of 20 and 70.
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Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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