Sorry.
It just seems to me that there is a connection between society - or at least a significant part of the young male portion of it - viewing women purely as sex objects and sex as a recreational rather than a sacrimental and procreative intimate act between two people who really love each other - and the simultaneous or slightly later appearance of man-hating feminazis as a connection.
But I guess there are people on this post who view that degenerate old reprobate as some kind of social icon.
Sorry to offend you.
Of course there is. Barbara Ehrenreich's The Hearts of Men is largely unreadable but her basic insight is spot on. Sometime around 1950 labor saving appliances made it possible for men to have clean clothes, hot meals, and a clean place without having to support a wife. A new class of upscale men saw the possibilites in the new freedoms. Instead of supporting a wife they could buy the swank bachelor pad, and the hi fi stereo set to listen to Dave Brubeck and discuss existentialism.
The Thunderbird and Playboy emerged to target this new urban sophisticated single male market. Instead of singleness being equated with a dorky kind of extended adolescence it was a time to revel in hep cat, Rat Pack, double martini Jet Age freedom. Playboy liberated masculinity from Field and Stream. Single men had a lot more interesting and sophisticated things to do than go hunting and fishing all the time.
And with the emergence of no fault divorce in the early 70's men were free to trade in their middle aged wives to jump into the sexual playground. The media then was full of horror stories about 50ish women without marketable job skills who were now expected to support themselves. So if marriage offers no security anymore, if the economic value of a wife's labor is worthless, the sensible thing for a woman is to always have marketable job skills. To enter the workforce and stay there.