I'm not too sure if this will help, but I would like to point out that my kitten, while not necessarily into the same lifestyle as I, will let me Dom her rather often. Regardless, however, I always make sure she gets what she deserves, usually an orgasm. There is hardly a time when I don't give her that, and recently she has needed it.

The real question should be what he would be getting from you. You could argue that it is something that would please you immeasurably, and that it would mean the world to you. You could also tell him that it isn't just whips and chains, and could be a chance to see a side of you that few others have witnessed.