Feminism seeks to challenge patriarchal power structures and change perceptions of women. Feminists criticize how mass media reinforce patriarchal ideology through gender stereotypes. They view media as contributing to ideas of masculinity and femininity. While gender roles have changed over time, media still presents disempowering stereotypes of women's bodies and sexuality. Various feminist theorists have examined how media objectifies and sexualizes women from the male gaze. Feminism has progressed through several waves focusing on social, political, and cultural equality and empowerment of women.