its saying 'I want you to notice me' though. And if a guy notices you he could hit on you and we know that. We choose what we wear and we know what kinda reactions we'll get if we had our boobs out vs if we didn't. So it might not be saying hey come hit on me but its wanting that sort of attention- to feel attractive
@Itsprincess: If I'm wearing a short dress it usually means more like "It's 98 degrees out and I don't wanna wear a long dress." But then again I don't hang around bars and clubs to look for attention like many others do.