Many societies assign sharply distinguished roles to men and women. Personality differences, as well as physical differences, between men and women are used to justify these different sex roles, and women are seen as more emotionally and interpersonally sensitive than men, while men are said to be more competent, achievement oriented, and assertive than women. A widely held view is that not only do men and women differ but that possession of "masculine" characteristics precludes possession of "feminine" characteristics. This bipolar conception has led to the definition of masculinity and...