Well here are some of the points you brought up and I want to address.
In terms of a woman's sexy picture, I wont call them sluts, but I might compliment a certain body part if it plays a prominent role in the photograph i,e, ass, lips breast, thighs etc.
Regarding your second point, female sexuality, two points. First, how can anyone be surprised that women have a sex drive, when vibrators and dildos exist. Also, studies have shown that women show signs of physiological arousal when watching sexually stimulated material, even while denying it. There is a disconnect between the psychological and physiological reactions.