the ultimate goal of women's liberation, thus women were urged to initiate sexual advances, enjoy sex and experiment with new forms of sexuality. The feminist movements insisted and focused on the sexual liberation for women, both physical and psychological. The pursuit of sexual pleasure for women was the core ideology, which subsequently was to set the foundation for female independence. Although whether or not sexual freedom should be a feminist issue is currently a much-debated topic, the feminist movement overtly defines itself as the movement for social, political, and economic equality of men and women. Feminist movements are also involved the fight against sexism and since sexism is a highly complex notion, it is difficult to separate the feminist critique toward sexism from its fight against sexual oppression. The feminist movement has helped create a social climate in which LGBT people and women are increasingly able to be open and free with their sexuality, which enabled a spiritual liberation of sorts with regards to sex. Rather than being forced to hide their sexual desires or feelings, women and LGBT people have gained and continue to gain increased freedom in this area. Consequently, the feminist movement to end sexual oppression has and continues to directly contribute to the sexual liberation movement. Nevertheless, among many feminists, the view soon became widely held that, thus far, the sexual freedoms gained in the sexual revolution of the 1960s, such as the decreasing emphasis on monogamy, had been largely gained by men at women's expense. In Anticlimax: A Feminist Perspective on the Sexual Revolution, Sheila Jeffreys asserted that the sexual revolution on men's terms contributed less to women's freedom than to their continued oppression, an assertion that has both commanded respect and attracted intense criticism. In the late 1970s and early 1980s, feminist sex wars broke out due to disagreements on pornography , on prostitution, and on BDSM, as well as sexuality in general. Contraception As birth control became widely accessible, men and women began to have more choice in the matter of having children than ever before. The 1916 invention of thin, disposable latex condoms for men led to widespread affordable condoms by the 1930s; the demise of the Comstock laws in 1936 set the stage for the promotion of available effective contraceptives such as the diaphragm and cervical cap; the 1960s introduction of the IUD and oral contraceptives for women gave a sense