hmm i think your Prince needs to look a little bit more powerful. well not powerful but i mean like domineering. just a little bit, since he's the 'guy on top' right now he seems to have about the same power as your Uke. at least to me. so maybe find a way to make him a more forceful looking character?
They are supposed to be of similar builds, it's the personalities that will differentiate the dominant and sumbissive roles. Richard has a very dominat (smart ass) personality ^_^
^_^