In case it’s not clear, the “polyamorous” fuckboy is not actually polyamorous in the way that they are alluding to. Nor does he have any intention of carrying out polyamory correctly, i.e. sustaining multiple romantic or sexual relationships with honest communication, respect and care. Rather, he wants to create the illusion of all of the aforementioned aspects of a healthy relationship so as to stick his dick in as many holes as possible, all of which he executes very, very badly.
Those old rules were there to curb this male passion. Get rid of the old rules and the passion won’t be curbed, will it?