The latest "Youth Reference" reported that a popular science exhibition named Kiss opened in Berlin, Germany, and a multimedia tunnel brought visitors into the exhibition hall. In the tunnel, people can see and hear the human body reaction caused by kissing instantly: the breathing frequency increases, the pulse accelerates, the cells expand, and the blood circulation increases, which is refreshing. After the visit, visitors can gain some other knowledge. For example, according to a survey, Germans kiss two or three times a day on average, so it is estimated that when they live to be 70 years old, they will spend about 76 days in their lives kissing.
According to the report, people who often kiss don't have to worry too much about deep wrinkles on their faces when they are old, because unlike those who are lazy to kiss, they will mobilize all 34 facial muscles at the same time every time they kiss, thus preventing the facial skin from becoming slack. From a scientific point of view, a passionate kiss plays a stimulating role, which is equivalent to 25 grams of chocolate, but it will not make people fat.
Ask what a kiss is in the world.
Francesca and Paul are an adulterous couple in Dante's Divine Comedy. Since their bloated bodies were born in a marble in Rodin's Paris studio, they have been kissing in the solemn conference hall of Louisville Auditorium for nearly a hundred years. People stared at the lovers who fell in love, walked slowly beside them, and kept saying to themselves "Great" and "Charming". They hugged each other tightly, and people could not even know whether Francesca and her lover exchanged saliva with their tongues-French deep kisses, which made the soul and body blend.
Almost every nation and dialect in the world has its own special words to express "kiss". Ethnographers speculate that human beings have kissed since ancient times. The song of songs written by King Solomon in the Bible begins with a passionate kiss. India's Love Sutra and pottery unearthed in South America both prove that kissing is an ancient activity.
The ancient Roman poet said, "Kissing is a meadow full of flowers in summer"; Shakespeare said, "Kissing is the mark of love". Sculptors like Rodin, painters like Klimt, and countless writers, poets, photographers and film directors have left immortal masterpieces for the world around the theme of kissing. Today, scientists also have something to say about kissing.
Double lip ignition chemical reaction
Kissing can make people's hormonal fire burn violently. What is the chemical secret? The scientific community began to pay attention to this problem about 30 years ago. In recent years, with the rapid development of biochemistry and neurophysiology, new research fields have been opened up-how emotions are generated, how feelings or memories stimulate emotions, how emotions affect our behavior and so on. The researchers also found that for desire and passion, it is more the result of the interaction between hundreds of billions of nerve cells and thousands of transmission substances.
When the human body receives attractive kissing signals, the release of serotonin, a happy hormone in the brain, can make a person more relaxed and calm. Subsequently, phenyl ethylamine-phenylethylamine, like an arrow in Cupid's hand, played a role in fanning the flames, causing people to have sexual desire and ecstasy: the heart was pounding, the whole body was feverish, blood pressure rose, sweating, saliva increased, and a heartfelt and thrilling feeling filled the body and mind. At this time, the production of adenosine triphosphate, which is greatly mobilized, provides the human body with the energy it needs and makes the heart beat faster.
Gian Gessa, head of the Department of Neurology at Cagliari University, explained: Before a couple's lips touch, the desire and expectation for contact begin to activate neurons in the brain. Entering the kissing stage, touch and smell strengthen the stimulation to neurons, and dopamine can make cells produce the neurotransmitter dopamine. When dopamine is released and diffused in the brain, a sense of pleasure arises spontaneously. This is why couples feel happy when they kiss. The same mechanism works when people taste chocolate, or when addicts "smoke a cigarette after a meal".
So, what profound influence will a affectionate kiss have? "In a good kiss, you will groan, and your brain will be empty, because the blood will flow faster in the blood vessels and the blood supply to the head will be reduced. You can't think at this time. " This passage is selected from the guide to love published by Hugh Morris 1936. If the two people kissing are congenial adult partners with good sexual and psychological qualities, then the effect of kissing is tantamount to a surge in amphetamine. Dopamine began to flow rapidly around the brain, the secretion of testosterone in both sexes increased, and adrenaline and norepinephrine were secreted by adrenal glands, which increased blood pressure and the heartbeat soared from 60 80 beats per minute to more than 100. The capillaries under the skin of the lips are congested, and the lips become red and swollen, which is very sexy (this is the reason why red lipstick is popular). In an unusually passionate kiss, the pituitary gland at the bottom of the brain secretes vasopressin. Scientists believe that this magical hormone can stimulate us to form a love relationship, and it can also help childbirth and stimulate women to secrete milk.
That's what scientists say about kissing
Kissing seems simple, but it drives the activities of many tissues and organs of the body. "Compared with the movements of the upper and lower limbs, the accuracy of lip movements is unbelievable." Professor Gus Magrut, director of plastic surgery at University College London, said. He studies how to correct oral defects by kissing. "This is good exercise. When you kiss, many muscles on your lips contract. The levator muscle vertically distributed in the lip lifts the lip and makes it protrude forward and outward. At the same time, the orbicularis oculi muscle is closed, which is distributed around the lips in a ring shape. These muscles coordinate their movements so that the lips can protrude and kiss. There is a transverse muscle inside each cheek, called buccal muscle, which is distributed from the mouth to the ears. When it tightens, it can control the position of the lips. "
Although lip muscle movement is the basic condition for kissing, people enjoy it because there are a lot of nerve endings in the mouth. The area of the brain that controls the mouth is actually larger than the area that controls the genitals. Margaret Hart, a researcher at the Kinsey Institute of Sexology in Indiana, said: "Lips, mouth and tongue are the most sensitive parts of the human body. Of the 12 nerves that affect brain function, 5 are related to kissing. Because the brain is closely related to the lips, tongue, cheeks and nose, people can feel the temperature, smell, taste and movement when kissing. One bundle of nerves controls muscle contraction and the other bundle of nerves controls sensation. " Professor Gus Magrut explained, "These nerves meet in the brain. When kissing, you need your brain to tell you where your lips are, so you will never kiss on the tip of the other person's nose. The whole process is carried out under the control of the brain, which takes only a few microseconds, which is faster than any computer. "
The study found that each deep kiss consumes about 3 calories. For a vivid example, kissing 1000 times a month makes you lose 5 kilograms. American scholars have found that people who kiss their sweetheart goodbye every morning have more successful careers, fewer accidents and fewer visits to doctors. Kissing can strengthen the body's immune system and reduce tension.
Lucia Rosa Cantafio, a psychologist of the Italian Clinical Society, explained: "Culture has a decisive influence on the meaning of kissing. In Europe, kissing marks the beginning of an emotional relationship. This is the prelude to the song of love, a way of contact before sex. For Americans, kissing is a sexual gesture and a confirmation and affirmation of sexual relations. However, cultural factors do not affect the importance of kissing. In all societies, kissing can be recognized from an instinctive perspective. Kissing is the best emotional thermometer for two people, and the touch of lips is the closest contact to the depths of the soul, because it covers all feelings and is more important than real sexual relations. "