The single biggest predictor of love is proximity.
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Cuddling (or other ‘love’ acts) helps to heal physical wounds faster due to the release of Oxytocin which is proven to reduce swelling.
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In Korea, if you do not receive any gift on Valentine's day then all the singles go to Korean restaurants and eat black noodles to celebrate (or mourn) their single status.
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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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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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Historically, sweat has been an active ingredient in perfume and love potions.
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A man's beard grows fastest when he anticipates sex.
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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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