The ancients said that men and women are United and not tired.

In the process of conquering the universe, human beings are in trouble: during space flight, 60.6% astronauts will have "space syndrome", such as headache, dizziness, insomnia, irritability, nausea and depression, and all drugs are useless. Why? A few years ago, Australian researchers who visited the Antarctic also suffered from this strange disease. They suffer from insomnia at night and feel groggy during the day. Many methods can't be cured. After investigation and study by relevant departments, the conclusion is that "the mismatch between men and women is the result of the serious imbalance of gender ratio leading to the lack of odor of the opposite sex". Therefore, Professor Harry, a famous American doctor of medicine, suggested to NASA that a healthy and beautiful woman should be selected for every space flight. Who knows, such a simple method has solved the problem that puzzles mankind to conquer the universe. In the study of real life, medical psychologists also found that in the working environment with only men or women, although the conditions are superior, the hygiene meets the requirements and the degree of automation is high, both men and women are prone to fatigue and the work efficiency is not high. According to research, the proportion of the opposite sex in an organization should reach at least 20%, and the age gap should not be too big, so that the work efficiency will be higher.

This psychological effect produced by Teacher Liu after the arrival of female college students is exactly what we usually call the "men and women are tireless" effect. Like teacher Liu, in fact, each of us may have such personal experience. Working with the opposite sex, we always feel relaxed, happy and tireless. This is definitely not because we are all lascivious, but there are some scientific and psychological reasons in it.

Psychologists have found that the psychological effect of "men and women are tireless" is often more obvious in men.

This is mainly because men prefer to obtain information about the opposite sex through vision, such as the appearance, hairstyle, skin color, figure and other external characteristics of the opposite sex, which is easy to arouse their great interest and will have a certain impact on their sensory organs and make them feel happy. In addition, psychologists also found that the desire of men in front of women is much stronger than that of women in front of men, and the desire and performance itself will stimulate the human body to produce more neurotransmitter dopamine. Dopamine is a nerve conduction substance, which can arouse people's excitement and enhance people's motivation. The normal increase of dopamine level in human body will make people feel infinite vitality and excitement.

Similarly, women will have this desire to show in front of men, but not as strongly as men do in front of them. Women's desire to perform will also cause changes in dopamine levels in the body, thus improving their excitement and enhancing their work vitality. In addition to the above two reasons, there is another reason that cannot be ignored, that is, men and women are complementary in many aspects, such as personality, and working together will fully show this complementarity. If women and women work together, or men and men work together, it will not reflect the complementarity of this personality, and work efficiency will definitely be affected.

Scientists have found that pheromones released by the human body are easily received by the surrounding opposite sex and have an impact on their behavior. In addition to psychological and spiritual factors, the researchers also put forward another reason to explain the effect of "cooperation between men and women is not tiring". After 1970s, scientists became more and more interested in the study of pheromones, and discovered the influence of pheromone activities on human and animal behaviors. Exohormones release hormones through glands distributed on human or animal skin or external organs. This hormone generally has an obvious smell, which is easily received by the surrounding opposite sex and has an impact on their behavior.