'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
You burn 26 calories in a one minute kiss.
605
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!)
278
Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13
Men who kiss their wives in the morning live five years longer than those who don't.
1k
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
Kissenger is a pig-shaped robotic device that lets you kiss someone over the internet.
5
On average, a human being will have sex more than 3,000 times and spend two weeks kissing in their lifetime.
161