This is a strong gallery shot - I like it for that. Broadly it hits the nude theme (of course) and it is well-constructed but I think it does side-step the genre.
Love the idea. It's a shame the voyeur is tucked away, I'd have liked to have seen a bit more of him and his pose, to try to work out how he is feeling. I know the usual idea of a voyeur is being hidden, so it does work here; I just think because the subject of his voyeurism is so still and incapable of awareness of him, it'd have been an interesting change to see him more clearly. Overall though, I do like the shot.
Not sure if this was intentional, but framing the voyeur just behind the corner makes his appreciation of art into a shameful obsession. It fits the title perfectly. well composed, too. I really like photos that tell a little bit more about what is happening rather than just capturing a split second.