We all have strengths and weaknesses, and where we possess special powers or talents, we are supposed to use it for good, to help the weak, not to harm others.
Chivalry in medieval times called for male physical strength to be used constructively, such that women be treated better than how they were being treated at the time. Women possess greater emotional strength, and chivalry in modern society calls for this emotional strength being used for good; to protect and nourish men emotionally.
If a woman were to slap a man in public, other women would likely cheer her, and men might say he asked for it. If genders were reversed, other women would be appalled and protest, likely report to the police and a chivalrous man would step in to protect the woman. Why the difference? Women have men convinced that they are always the ones at fault, which in itself is abusive, so they believe that the man deserved it, whereas women as a collective look out for each other. The sexist double standards of modern society are evidently in reverse.
Women too need to be chivalrous and step in to defend a helpless man against a vile woman, since they have the emotional strength to deal with another woman. There should be no hesitation lest it be construed as emasculating. Chivalry is charming, and as long as it comes from a good heart it is not at the mercy of how it is perceived. If it is not appreciated, it is the recipient’s loss.