Was there a sexual revolution in the 1920's?

At the time of the 1920's many people believed that there was a revolution going on that was, "literally saturated with sex."  Now looking back on this era one sees that this was not entirely true.  Communities were changing, cars made it possible for young people to go on dates instead of just talk on the phone.  Educational institutions had almost the same amount of women as men.  This mad for some new normals for women.  Contraceptives also made it possible for premarital sexual intercourse.  All of these changes made for women to look more promiscuous.  

1.  Why did movies, and peers affect the young people more then communities and family did?  Was this good or bad?

2.  Why would most people think that a women's new found freedom was the cause for this revolution?