Are not women in general today, at least those in larger cities and not subject to religous cultural morals more promiscous then in the past?
Is it not easier for women today to be promiscous then in the past (birth control, careers of their own, instead of being financially dependant on a male)
The double standard is a cultural aspect based on certain biological traits like jealousy affedt both sexs, but wowen in the past did not have much power to cause the other to face the negative aspect of jealousy. Women tend to suffer more from jealous rages from men (being killed, beaten etc). Men had the power to enforce the cultural aspect of the double standard, women did not. That is changing, and so is the power of the double standard