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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People are more likely to tilt their heads to the right when kissing instead of the left (65 percent of people go to the right!)
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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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When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
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Falling in love raises levels of nerve growth in a person's brain for about a year and can improve their memory.
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In medieval Italy, if a man was caught kissing a woman in public, he had to marry her whether he liked it or not.
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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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