I will surely get crucified for pointing this out, but my experience indicates that there is a pervasive mentality among women specifically of certain fandoms that because they are women, they can't be the perpetrators of sexual harassment, only the victims, and then only specifically by men. Therefore they can do whatever they want to other women because we're all girls, so obviously it's "allowed."

This occasionally seems to get logically extended to the notion that women can harass men without consequences, either because only women can be the victims of sexual harassment or violence (see above), or that the men in question ought to just enjoy the attention and be grateful for how "lucky" they are.

All of the above is broadly analogous to one dude coming up to another dude and just grabbing his crotch. Everyone can imagine how that would play out, and thus it's self-evident to any outside observer that this kind of mentality is bullshit.