A woman's boob is not equivalent to a man's penis. If anything, a vagina is is the equivalent to a penis, as both organs are used as part of sex. A boob is not normally used as part of sex. That being said, if we all agree that no genders can show their sexual organs then that's fine. That's at least an equally applied rule.

However the issue here is that some men, and some women too, find it bothers them to see boobs, but only female boobs. It's irrelevant if some woman happen to agree, because a woman can still oppress woman, just as a Chinese person can still be racist towards Chinese people.

If a women dressing sexy (but otherwise within the generally accepted constraints of not showing genitalia or nipples) and then gets raped by a person (man or woman), is it her fault or the person's fault? Is she asking for it by dressing sexy? Sexy here is in the eye of the rapist, and whether the women thinks she is dressing sexy herself is irrelevant, so I would argue that it is the rapist's fault. If a woman does something to her outward appearance such as enlarging her breasts or dressing "immodestly" and it causes weird feelings or urges in some people, those feelings are wholly the fault of the person feeling them.