Kissing an infection-free partner is good for your teeth!
The average person in their lifetime will spend an estimated 20,160 minutes kissing!
As a rule, 66 percent of people keep their eyes closed while kissing. The rest take pleasure in watching the emotions run the gamut on the faces of their partners.
Research has shown that allowing chocolate to melt in your mouth produced brain and heart rate activity that was simliar to - and even stronger than - that produced with passionate kissing.
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!)
'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.
In medieval Italy, if a man was caught kissing a woman in public, he had to marry her whether he liked it or not.