When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
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Studies show that the risk of a “secret love” being revealed heightens romantic feelings for the partners, thanks to increased levels of phenylethylamine (PEA).
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In Korea, if you do not receive any gift on Valentine's day then all the singles go to Korean restaurants and eat black noodles to celebrate (or mourn) their single status.
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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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Speed dating was invented by a Rabbi in 1999.
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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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Gary Kremen, founder of match.com, lost his girlfriend to a man she met on match.com.
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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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