The issue of contention here is that women have to adjust their behavior/physical appearance over some non genitalia body parts because it happens to induce sexualization in some men, and men don't have to cover that same body part.
What if the majority of people were sapio-sexuals instead of breast-sexuals? Do I need to start dumbing down my HN posts so that I don't be perceived as immodest? Given the diversity of sexual preferences where do I draw the line of accommodating others' sexualization boundaries?
For the record I agree with you on genitalia, because at least both men and women are not allowed to show them. But breasts? It is not genitalia—it is not even used in the act of sex (normally)!
Edit: I would like to add that its not okay to demonetize Naomi Wus 3D Bust Video. Thats another discussion and i think we are on par here.
Showing primary sexual organs in my opinion is not a question and shouldn't be tolerated in many venues. It is a form of aggression in almost every culture. Even some hunter gatherers who walk around with genitals visible often have some way of making it less offensive. Very rare exceptions...