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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Holding hands with someone you love can alleviate physical pain as well as stress and fear.
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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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Sandy, an African Penguin, has been in 'love' with her keeper at the Nuremburg zoo since 1996.
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Twenty nine percent of women spend more time shopping for shoes than they do looking for a life long mate.
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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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Historically, sweat has been an active ingredient in perfume and love potions.
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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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