“Women have chosen to be like men.
Men have decided that if they are going to live with a man, they prefer one that pays their share and doesn’t try to change them into a woman.”
That sums it up nicely. Men can get laid often enough, so sex isn’t a problem. I guess we could also say, “Why buy the cow when the milk is free.”
Women have been taught that sex with a single man is liberating, while sex with their husband is prostitution. The absurdity doesn't appear to phase them.
Men have responded by choosing "friends with benefits" over "marriage without benefits".