I enjoy this picture. Not because "Ooooh naked lady," but because of the pose. Every physical trait is visible, making her an excellent subject to emulate through pencil work. The shaved head makes it even more of a great reference to use as a human figure. All in all, the model herself is quite beautiful, but the possibilities that can be done with this is what makes it even more beautiful.
You photographed a noun beautifully, and subtracted the series of disciplined choices and actions that made this image possible; then you named the photograph for those invisible processes. The strongest reference to action here is your subtle treatment of gravity.