Most Helpful Guy
Of course guys notice what women wear, it's impossible not to notice something you look at. That said, if what she's wearing is appealling then we are attacted, it's an involuntary response. In short, dress well and more men will be attracted to you.
As for cleavage and short shorts, they are a definete plus, they show off a woman's "goods", and leave us with the impression that she wants to attract a mate, a sign we find encouraging, plus, it show's she's may be more willing than other women to have sex since she is obviously advertising.