" Although an increasing number of girls have begun to participate in team (not individual) sports, most girls still do not compete as a group against another group of girls. Many girls still demand an egalitarian, dyadic reciprocity and are, therefore, more threatened by the slightest change in status. The dyad is the female equivalent of the hierarchically structured boys club. A change in status of one member of the dyad may mean that the entire club is endangered. According to Benenson and Bennaroch, “If a friend is succeeding in school, then the friend might be spending more time studying, or if the friend has a boyfriend, then she might be abandoning other friends to spend time with her boyfriend.” By contrast, boys who are members of the same group feel enhanced by the achievement of any other group member, even if he is a close friend. "

― Phyllis Chesler , Woman's Inhumanity to Woman