In Korea, there's a man named Lee Jin-gyu who fell in love and married his life-sized Japanese body pillow (called a "dakimakura").
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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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The average person will go on a date at least 100 times before they finally marry.
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Erotomania is a type of delusion in which the person believes another person is in love with him/her.
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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 someone looks at a new love, the neural circuits that are usually associated with social judgment are suppressed.
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Couples' personalities converge over time to make partners more and more similar.
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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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