I normally dislike shots featuring a domme reduced to just her boots or a torso. Faces and a sense of connection between participants is normally important to me. Yet there are always exceptions, and this is one of them. The composition fits both his perspective and the psychology of the scene.
I love the marks on his back, the simplicity of the room and the arrayed selection of implements. I like to imagine he has been told to maintain that position no matter what, and she has been prowling around him, picking and choosing whips as her whims take her. For almost an hour now the only sound has been her heels, his stifled cries and the occasional self satisfied sigh from her as she inspects the whip marks.
I’m afraid I don’t know the original source for this. You see a larger version on the tumblr that originally posted it.