'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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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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8 out of 10 people think that the first kiss indicates how the rest of the relationship will be.
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Parents receive 1 out of every 5 Valentines.
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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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