'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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Men who kiss their wives in the morning live five years longer than those who don't.
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People are more likely to tilt their heads to the right when kissing instead of the left (65 percent of people go to the right!)
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Historically, sweat has been an active ingredient in perfume and love potions.
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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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Speed dating was invented by a Rabbi in 1999.
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