Falling in love raises levels of nerve growth in a person's brain for about a year and can improve their memory.
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Erotomania is a type of delusion in which the person believes another person is in love with him/her.
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Speed dating was invented by a Rabbi in 1999.
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If you mouth the word "colorful" to someone, it looks like you are saying "I love you".
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In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
4
Men fall in love faster than women do.
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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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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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