Final answer:
Margaret Sanger believed that traditional sexual morality was evolving due to the Jazz Age's more liberal social attitudes, the influence of thinkers like Freud and Ellis, and the popularization of contraception, which she championed. These changes gave women more control over their reproductive choices, challenging longstanding ideas of family and sexual virtue.
Step-by-step explanation:
According to Margaret Sanger, traditional morality related to sexual intercourse was dying out due to several social changes during the Jazz Age. The increasing social and cultural boundaries being pushed by men and women led to more permissive sexual mores. Sanger's work in promoting birth control was instrumental in this shift. She advanced the notion that women should have the choice in matters of reproduction, thereby impacting the traditional views of the family where suffrage had done little to instigate change. Accompanying the rise of informal sexual attitudes were the popularization of contraception and the advent of the automobile, which provided private spaces for intimate encounters, changing sexual behaviors.
At the same time, Sanger's activism highlighted the contrast between modern attitudes about sex and the antiquated notions of purity that continued to enforce misogynistic attitudes. With the spread of information on birth control, women gained more control over their bodies and reproductive choices, leading to improved standards of living for families and a shift toward acknowledging mutual sexual satisfaction as part of a healthy relationship rather than a sign of female insatiability.