Just have to get used to it, cuz that's what guys do. She could always have double masectomy or breast reduction if she wants. Most women want tohave bigger boobs in my experience.
What if Steve Jobs or Schwarzennegger or Thomas Edison liked large chested women ?? "Weeding out" these guys could mean turning down a good husband.
I wouldn't judge men merely because where their eyes go. What is important is what's inside the man and just because I look at a girl's breasts doesn't mean anything other than they were within my view and I am a good observer. I also observe birds, grass, dirt, automobiles, the sky and the sun, because they are within my view.
What do people expect a man's eyes to do when presented with a female at close range ?? Ignore them ? God put them there for a reason , ya ?? Partly to attract a mate. Yes some menb will gawk, that just comes with the territory of being a girl. I'd say to get used to it, or cut them off or have reduction surgery.