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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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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Brain scans show that people who view photos of a beloved experience an activation of the caudate - the part of the brain involving cravings.
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A man's beard grows fastest when he anticipates sex.
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Men fall in love faster than women do.
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For Valentine's Day 2014, an unnamed man sabotaged a special screening of "Beijing Love Story" at a Shanghai cinema by booking every other seat, subsequently preventing couples from sitting together.
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When dragonflies mate, their tails form a love heart.
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