Passionate kissing burns 6.4 calories a minute. A Hershey's kiss contains 26 calories, which takes five minutes of walking-or about four minutes of kissing-to burn off.
Sensitivity of the lips is 200 times higher than that of the fingers.
More Kiss Facts
According to U.S. statistics, an American woman would kiss an average of 80 men before she gets married.
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.