Why do men have to live in conformity with society?

First, it can be answered from the consensus theory that views man as part of society in the same sense as a part of a body that operates under certain rules. Thus, men as individuals should behave according to common rules to make a well-regulate society. If those fail to conform the rules they are viewed as "deviant", such as Mad Men, criminals... that need corrections from social institutions such as hospitals and prisons to train them back into the normalcy and conformity.

Second, another standpoint based on Foucault's notion "power/knowledge", which argues that humans and human bodies are sites of power operation. Men are viewed as the object and subject of state, social institutions and himself. Men have to conform rules in society as a result of the governmentality, that is the technologies of governing of the state to manipulate and regulate its population by using the technologies of the self. Men are made to think of the things they should and should not do as he's constantly viewed himself and viewed by others around to monitor oneself to conform certain sets of rules. For example, students - the developing, immature, unmarried thus they need to conform the rules from family, school and society at large, such as to study, and to abstain from sex to avoid getting pregnant and entering parenthood. However, power does not mean only oppression, it also produces resistance, so it is always dynamic and transforming in fluidity in time and space. Men also have agency to make their own decisions to regulate themselves in many different ways to conform to the rules, thus we have diversity of ideas, behaviors and meanings that people make sense of everyday life practices.