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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Men who kiss their wives in the morning live five years longer than those who don't.
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The single biggest predictor of love is proximity.
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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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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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The average person will go on a date at least 100 times before they finally marry.
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The typical person spends about 600 hours having sex between the ages of 20 and 70.
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