Gender roles, gender identities, the concepts of masculine and feminine; they are all mere examples of conformism. You may think there are certain ways that males or females should think, dress or act, but why is that?
Is it because you logically concluded that there are certain ways the sexes should behave? Or is it because you are merely conforming to the conservative views of an ignorant society and flawed culture? It is disgusting to think that some people still believe that there are certain traits beyond the obvious biological differences of the sexes that determine what makes a man a "man" and what makes a woman a "woman."
It is a stifling of individuality in favor of conformism. This all boils down to one, single truth: you should act as an individual. Not as a custom or an idea.
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It's probably impossible to think of yourself totally as an individual, unaffected by any aspect of social conformity. Also, many people conform even after considering individual alternatives. There is usually (not always) a logical reason people think, dress, and act the same. To go against *all* conformity is being different just to be different.