Opportunity cost. Choosing an opportunity means giving up another opportunity, so the choice needs to pay a price, and this price is the cost. For example, if you are hungry to lose weight, then the desire to lose weight through fat reduction is income, and eating hungry and the resulting hunger and damage to organs are the cost of input. Because of the exclusiveness of human love, choosing extramarital affairs will sacrifice the once happy family and have a negative impact on personal reputation. When a person is faced with the temptation of love after marriage, he can choose to refuse or have an affair. Then, when choosing extramarital affairs, he will pay the opportunity cost of sacrificing his family and personal reputation. 1 risk cost. There are risks in doing anything, and to guard against these risks, you have to pay the cost. For example, it may be poisoned if eaten. In order to prevent poisoning, we have to spend more money to buy food from regular producers and sellers, instead of buying food that may be contaminated or of poor quality from stalls for cheap. Extramarital affairs are high-risk activities because they are not normal relationships. In order to guard against risks, we should be cautious and pay more energy, material resources and financial resources, which is a risk cost. The other is that extramarital affairs are not protected by law, so they are in danger of disintegration at any time. In order to stabilize the relationship, both men and women or one of them will take measures such as mental networking and material temptation to prevent risks, and these inputs are also risk costs. Information cost. The cost of obtaining information or the loss caused by the unsmooth (or asymmetric) information can be regarded as the information cost. This is the information age. For the whole society, people pay a high price for information, and extramarital affairs are no exception. In order to know each other's situation, whether out of concern or reconnaissance, both parties involved in extramarital affairs should make use of China, China, letters and interpersonal communication, so they should pay China fees, China's Internet usage fees, communication fees and interpersonal entertainment fees. In addition, one or both sides of an extramarital affair can't get the information about their communication results correctly, so that they are addicted to it, and eventually their emotional activities fail due to the lack or asymmetry of information, which will bring pain, regret or helplessness, thus affecting their personal career. This is also the information cost. The cost of meals and entertainment. Everyone has to have a good time. Because of special circumstances, the parties involved in extramarital affairs further increased the consumption of meals and entertainment expenses. Because they don't aim at life, they only aim at pleasure, so the cost of eating and entertainment is higher than that of normal people. In order to please each other, one party who has an extramarital affair often spends more money. Few novels describe the extramarital affairs of two people eating porridge and pickles together. In terms of entertainment, the entertainment that extramarital partners often engage in in in the novel is singing and dancing in dance halls, or drinking tea and chatting in cafes and teahouses, which will cost a lot. Etiquette cost. In order to establish a good image, individuals or enterprises and institutions need to invest in public relations etiquette. Extramarital affairs pay for etiquette, one is the cost of buying flowers, Valentine's Day, the other party's birthday, Christmas and so on, and flowers are needed to win the other party's favor. Second, cakes and snacks, buy cakes or snacks such as melon seeds, peanuts and sour plums for each other's birthdays or festivals to adjust the atmosphere. Except for children, everyone eats cakes and snacks only for its symbolic meaning, so the expenses in this area belong to the etiquette cost. The third is cosmetics, mostly the cost consumed by the woman. Fourth, clothes, buy clothes for each other to maintain a good image and consolidate the relationship. Psychological cost. Psychological cost is the cost paid to meet the psychological needs of the other party or both parties. For example, buy expensive jewelry, or even buy a car or house. Because neither side aims at the ultimate life, one side asks for gold and silver jewelry, a car or a house, mainly for personal gain and to meet psychological needs. The price of sexual love. Some people deny that sex costs money, which is incorrect. Normal sexual behavior between men and women (or the same sex) requires emotional, energy and physical costs. In addition to the above-mentioned expenses, the relationship between the two parties involved in extramarital affairs also needs to pay for meeting places and ensuring the safety of sex. If extramarital affairs develop into "keeping mistresses" and "keeping mistresses" with sex as the first goal, then the cost of sex will be higher. The above is the main cost analysis of extramarital affairs. Man is a social man and an economic man. As a part of the superstructure, people's feelings are subordinate to the economic base. Therefore, if you want an extramarital affair, you must first prepare for the cost. Compared with normal love, extramarital affairs cost a lot, but the input-output ratio is much lower. After the cost of extramarital affairs is invested, there is a short-lived romantic feeling that only cares about personal interests, while the cost of normal love between men and women will be exchanged for lasting warmth. Through this cost analysis, we appeal to those who seek romance through extramarital affairs to get lost, and appeal to those who are prepared to achieve pleasure through extramarital affairs to pull back from the brink. In addition, tell the reader a secret. Instead of seeking extramarital affairs, it is better to adjust the way of resource allocation and treat the cost of extramarital affairs as a normal emotional input, so that you can get lasting warmth and lasting romantic experience. At the same time, it is also suggested that one or both married couples who have extramarital affairs should end the original project cooperation relationship as soon as possible, so that the limited cost can be legally used for other projects. We should know the social morality of the supervision unit of Caring Project, and do not object to the bankruptcy of Caring Project whose foreseeable cost is far greater than its income, but oppose the construction party to withdraw the cost funds for other projects, which leads to the emergence of "tofu dregs" projects in the current projects.