Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
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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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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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'X' became symbolic for a kiss because in the middle ages when alot of people were illiterate and they used to sign documents with an X and then kiss it for sincerity.
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In 2010, Gary Richmond was beaten into a coma. He woke up with amnesia and no memory of his wife of 20 years. Subsequently, he ended up falling in love with her all over again!
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Parents receive 1 out of every 5 Valentines.
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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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