One could argue that the “sexual revolution” started with the passage of the 18th and 19th amendments to the Constitution...
Before that, to when lady began being used for other than royalty. The typical woman is no lady, nor the typical man a gentleman.
I believe it was better when the sexes were true to their real natures, and recognized each other as they are by nature.
Today, its all shaken up, because progressives/leftists want and teach it that way.