Holding hands with someone you love can alleviate physical pain as well as stress and fear.
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Historically, sweat has been an active ingredient in perfume and love potions.
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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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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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Raj from the Big Bang Theory is married to Miss India.
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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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In 2012, a Chinese man named Xiao Fan had a dress made out of 9,999 red roses for his girlfriend and then proposed - 9 in China means forever
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The average person will go on a date at least 100 times before they finally marry.
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