Holding hands with someone you love can alleviate physical pain as well as stress and fear.
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In 2010, Gary Richmond was beaten into a coma. He woke up with amnesia and no memory of his wife of 20 years. Subsequently, he ended up falling in love with her all over again!
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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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40% of people who are rejected in romantic love slip into clinical depression.
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Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
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When dragonflies mate, their tails form a love heart.
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Raj from the Big Bang Theory is married to Miss India.
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In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
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