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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8 out of 10 people think that the first kiss indicates how the rest of the relationship will be.
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In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
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40% of people who are rejected in romantic love slip into clinical depression.
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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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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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When you fall in love, that 'high' feeling is caused by a flood of dopamine that is similar to that of cocaine.
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According to the New York Times, a study conducted during the 1980's found that men who kiss their wives before leaving for work live longer, get into fewer car accidents, and have a higher income than married men who don't.
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