When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
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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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As a rule, 66 percent of people keep their eyes closed while kissing. The rest take pleasure in watching the emotions run the gamut on the faces of their partners.
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In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
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Ten seconds of hugging a day increases levels of oxytocin, which can reduce blood pressure, thus cutting the risk of heart disease.
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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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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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Speed dating was invented by a Rabbi in 1999.
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