Holding hands with someone you love can alleviate physical pain as well as stress and fear.
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A couple had their wedding rings engraved with a waveform of their own voices saying "I do."
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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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Two in five people in the world marry their first love.
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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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Sandy, an African Penguin, has been in 'love' with her keeper at the Nuremburg zoo since 1996.
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40% of people who are rejected in romantic love slip into clinical depression.
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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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