Look, dude, it's not about inherent worth. Framing these discussions in such terms is a rhetorical trick to evade their actual subject matter. The real issue is that being cheated on, of losing "sexual control" over your partner (and that phrasing is another rhetorical trick, a way to disguise the real emotional structure of the desire for fidelity as, instead, some sort of patriarchal construct), is /subjectively/ devastating. It /does/ make you feel diminished as a person. It /does/ make you feel "worth less" -- which is, in fact, essentially the message semaphored by your partner deciding to seek satisfaction elsewhere than you. It is a terrible feeling to be told -- explicitly, or even more horribly, implicitly -- that you are not enough for your partner.

This isn't about sexist, fascist, or racist(???) language. It's not a fiction concocted by the far right. It's about the emotional realities of being a human being -- not some fantasy caricature.