Brain scans show that people who view photos of a beloved experience an activation of the caudate - the part of the brain involving cravings.
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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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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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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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Raj from the Big Bang Theory is married to Miss India.
11
Historically, sweat has been an active ingredient in perfume and love potions.
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Cuddling (or other ‘love’ acts) helps to heal physical wounds faster due to the release of Oxytocin which is proven to reduce swelling.
22
In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
4