If all this time people look for reasons happy kisses let's look at the scientific reasons put forward by scientists. Because according to scientists that there is scientific explanation kiss is not just lust.
Researchers from Lafayette College in Pennsylvania have found the answer to why kissing can make a couple happy. Researchers say that when the lips 'locked' is actually happening spark an increase of hormones in the brain.
Due to a series of complex chemical process, the kissing couple will experience a combination of feelings, of relaxation, joy and love.
Holding hands (touch) and kissing can also reduce levels of cortisol which is a stress hormone. So it is not surprising that many who think that kissing is an easy way to relieve stress.
Kissing can transfer information and make a person familiar with their partner's personality more deeply. Exchange of information is caused by a chemical signal, which is a pheromone which is also used by animals to convey a message.
Based on research at the University of Albany to the 1041 participants, it is known that men are generally happy to make French-style kiss the wet because saliva contains testosterone, which can trigger the female libido.
"There is evidence that saliva has testosterone in it, and testosterone can increase sex drive. There is evidence that people who kiss with open mouths unconsciously they try to transfer testosterone to stimulate the sex drive in women," says Helen Fisher, Rutgers University anthropologist .
According to Fisher, he can transfer saliva to assess the female fertility cycle and estrogen. Other experts also said that he could lure female estrogen, which is also the detector if the woman is infertile or not.
And do you know when someone simple kiss (kisses) there are two facial muscles are active, whereas when a passionate kiss then all the muscles (34 muscles) in the face of actively participating.