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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The typical person spends about 600 hours having sex between the ages of 20 and 70.
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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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One in five long-term love relationships began with one or both partners being involved with others.
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For Valentine's Day 2014, an unnamed man sabotaged a special screening of "Beijing Love Story" at a Shanghai cinema by booking every other seat, subsequently preventing couples from sitting together.
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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
16
It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
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