'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.
255
In medieval Italy, if a man was caught kissing a woman in public, he had to marry her whether he liked it or not.
456
The average person in their lifetime will spend an estimated 20,160 minutes kissing!
212
Kissenger is a pig-shaped robotic device that lets you kiss someone over the internet.
5
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.
173
On average, a human being will have sex more than 3,000 times and spend two weeks kissing in their lifetime.
161
Kissing an infection-free partner is good for your teeth!
141
You burn 26 calories in a one minute kiss.
605