53percent of Women prefer to kiss a clean shaven man.

According to anthropologists, 90 percent of people kiss. But that doesn't mean that kissing is the same for everyone. Kissing customs vary across the world

Common chimpanzees kiss with open mouths, but not with their tongues. Bonobos, the most intelligent non-human primates, do kiss with their tongues

Kissing can increase your life expectancy A study has shown that men live up to five years longer if they kiss their wife before going to work

According to biological anthropologist Helen Fisher, we tend to prefer people with particular biological profiles. Trading saliva is one way to figure out if someone is a good fit.

Kissing is good for teeth. The anticipation of a kiss increases the flow of saliva to the mouth, giving the teeth a plaque-dispersing bath

Kissing is still illegal in some parts of the United States For example, in Hartford, Connecticut, its illegal for women to kiss their husbands on Sunday

Kissing triggers the release of oxytocin in your body

Mechanically speaking, kissing is almost identical to suckling. Some scholars speculate that the way a person kisses may reflect whether he or she was breastfed or bottle fed

More kissing in a relationship is related to how satisfied people say they are in that relationship

Most people remember their first kiss more vividly than the first time they had sex

On average, two-thirds of people tip their heads to the right when they kiss

Our brains have neurons which help us locate each other's lips in the dark

Over time, kissing lowers your levels of stress hormone cortisol, which helps create a sense of security.

The average person spends about 336 hours out of their life kissing

The first on-screen kiss was shot in 1896 by the Edison Company. Titled The May Irwin-John C. Rice Kiss, the film was 30 seconds long and consisted entirely of a man and a woman kissing close up

The mouth is full of bacteria. When two people kiss, they exchange between 10 million and 1 billion bacteria

The science of kissing itself is called philematology

The world record for the longest kiss goes to Ekkachai Tiranarat and Laksana Tiranarat with a kiss that lasted 58 hours, 35 minutes and 58 seconds

When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.

When you kiss someone your heart beats faster and more oxygen reaches your brain

When your lips touch someone elses 5 out of 12 of your cranial nerves are engaged

Women tend to rate kissing as more important in relationships than men do

Your lips have a disproportionate number of nerve endings compared to other parts of your body