40% of people who are rejected in romantic love slip into clinical depression.
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When you fall in love, that 'high' feeling is caused by a flood of dopamine that is similar to that of cocaine.
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When someone looks at a new love, the neural circuits that are usually associated with social judgment are suppressed.
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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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In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
4
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.
27
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.
25
In medieval Italy, if a man was caught kissing a woman in public, he had to marry her whether he liked it or not.
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