It’s funny. Ask this question in another way, and people are much more charitable.
Often, a guy can’t help it. The instinct to look at her breasts makes the eyes move before any conscious thought has occurred. Now, if a guy leaves his gaze on the girls, then sure, do what you will. But if he looks at you in between looking at your breasts, is that a problem?
I have found that some women have a pair I can’t keep my eyes off of. If I focus hard enough to keep my eyes on her face, I can’t hear what she’s saying. If I look, I can’t hear what she’s saying because I’m busy worrying about how bad this looks. I can’t win. So fuck it.