Graceful, abstract or interpretive? Stylised, straight or textbook? Masters may make it look easier, but the biggest problem I have observed is photographers not getting along with nude models. The photographer should also be a nude.
Try photographing either gender by a window with venetian blinds and the sun coming through. If you like zebra strikes, this simple and effective nude/interpretive/abstract affect has many, many angles to explore. Very especially with dark-skinned subjects.