In the Chinese philosophy of time, there are six or six great shun, and every seventh must change. Seven is a number of changes, which is reflected in the word "transformation" of change, and every seven must change has become the basic law of many things. When it comes to marriage, there is also a "seven-year itch" saying.
The seven-year itch refers to the fact that a marriage reaches its seventh year and all kinds of problems will occur. Two people from acquaintance to love, step by step will have a certain surprise. After the husband and wife get married, the two people also know more about each other, and the shortcomings of both sides are also exposed, so the two also have the situation of hating each other. At this time, one of the spouses will have an inner itch and want to find stimulation outside of marriage. Of course, every seven must change is an objective law, but the seven-year itch is only an excuse for people with incompatible feelings for themselves, and people who really know how to manage life are not afraid of the seven-year itch.
Some people think that in addition to the mental, physiological, seven-year itch is a human body's cells that are constantly dying and renewing, and that they are all renewed every 7 years. Cells are memory, encounter happy or sad things, they will silently write down, become the memory of the cell, if the same emotion appears again, the cell will receive, and continue, the body's cells have actually been in the metabolism, generally they take 7 years to complete this process.
If the reaction does not appear again, then after 7 years, no cell will remember, so it is possible that the original love in the cell has been completely lost, so it is called the seven-year itch. In fact, human cell replacement is a normal metabolic phenomenon, which has nothing to do with human feelings, and human brain cells and important parts such as the spine will not be replaced, so this statement is wrong.