It is said that it is a learned behavior, and our human ancestors would kiss. At that time, mothers chew food, and sent them with their mouths in the baby's mouth. Even if the child knocked the teeth, the mother will continue to kiss your child on the lips, in comfort. Support the "kissing is learned rather than instinctual" this assertion of the fact: not everyone kisses. Anthropologists said that tribes in many parts of the world don't really kiss.
Data show that 90% of people kissing, kissing while 10% does not. Animals kissing Others think that kissing is an instinct, like kissing, animal behavior as evidence. Most animals by repeatedly rubbing noses to express love for each other, other animals are just like people like to express their feelings through your mouth. For example, bonobos use Exchange of saliva expressed deep apologies. Their post-war, comforted each other and developing social relationships do sometimes inexplicably Kiss like a human.
Kiss 13 Today, the most recognized man kissing because it can help us to find the right partner. Man and woman face drew close, Pheromones are passed, growing stronger future generations of biological information. For example, women prefer different from their own immune system protein genes of men, this sex so they probably have a strong immune system and survival probability of more offspring. Lips and tongue are very sensitive Most people feel good kissing is satisfied with the explanation of the causes of mankind. Human lips and tongue is full of nerve endings, which can help human enhancement when you kiss the wonderful feeling of love. While kissing is wonderful, but usually does not prompt us to consider the question of why we kiss, how can only influence the human search for more ways to kiss.
Kissing Chemistry: oxytocin hormone So, what do we want to kiss them? Scientists found that kissing can alter the chemical composition of the body, rubbing the lips, exchanging saliva, change from brains release oxytocin levels in the blood, that oxytocin is a hormone that can make a person feel more intimate. The funny thing is, oxytocin is released during childbirth is considered the composition of newborn babies and mothers have a close relationship. Scientists also found that kissing during the competition, women release oxytocin reduces, and escort emissions actually increased.
Scientists do not know why is there this difference between men and women. Kissing led to happiness In addition to the changes in oxytocin levels, the scientists also found that 15 minutes kissing games, kiss a loved one stress hormones----reduction in the release of the stress hormone cortisol, which increases the well-being of lovers.
Wendi·heiershan, a Professor of Neuroscience at Lafayette College, Pennsylvania said: "very few people kissing in the present study. 」 Know each other kissing habits New Jersey Rutgers University of anthropology home Helen Fisher said, kissing can stimulus participation mating and breeding of three a main of brain system (libido, romantic love and long-term attachment) in the of any a: "libido incentive you looking for series of partners; romantic love is incentive you will you of mating energy once only concentrated in a personal Shang; attachment sense is incentive you keep partner related enough long of time, men and women both can with accompany children spent baby period.
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