Holding hands with someone you love can alleviate physical pain as well as stress and fear.
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Couples' personalities converge over time to make partners more and more similar.
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40% of people who are rejected in romantic love slip into clinical depression.
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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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A Korean man called Lee Jin-gyu fell in love with his large, huggable pillow and married it.
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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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