I guess I don't have any real concrete advice. Other than I don't suppose this area is any different than other areas of our R's. Same principals apply.
Do what works and don't what doesn't Create a safe happy place. Go slow with him, get him used to experiencing all that Karen has to offer...just not all at once.
Maybe he feels pressure to keep up with you or that he is not satisfying you the WAY you want.
I see this as a long term discovery session for you two. It will take time that as he feels comfortable to show you what he likes and he gets to feel the "benefits" safely, then you show him. Each time in between taking some time just to enjoy that new level before adding more.
