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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Gary Kremen, founder of match.com, lost his girlfriend to a man she met on match.com.
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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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Holding hands with someone you love can alleviate physical pain as well as stress and fear.
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A poll has found that computer 'nerds' make the best lovers, with 82 percent of IT geeks claiming they put their partner's pleasure above their own.
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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 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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