It makes sense to be suitable for each other. At least, the cultural background and living habits from small to large all want to die, and the attached outlook on life, values and views on things tend to be consistent: the economic base is roughly the same, excluding the unsuitable differences. Source: My mother-in-law is here.
3. A natural attribute under geomantic omen exists in the form of a universal law. Under this law, the qualitative (regularity) of the production and living habits of individuals or groups with different scopes, histories and cultures is a cultural attribute, which is independent of human will. Under the domination of this cultural attribute and the randomness of individual nervous system, the differences in appearance between individuals and the complexity of human nature are formed. These are three ways to explore nature.