Mojo, let me take a stab at giving a better response to your question. I'm afraid all I gave you was an initial reaction, probably not too different from your H - not terribly helpful.
What this looks like to me is something you would very much want, but what it seems like it would amount to is a huge favor your H can do for YOU. I'm still having trouble seeing it, but it seems like it would have very little erotic payback for HIM. So this would be the type of thing that Michele refers to as "real giving" - he doesn't have to understand it, or even enjoy it, but it would be something he could do for you that you would really enjoy. Nothing wrong with that, but it doesn't sound to me like he's at the stage yet where he would even be really capable of "real giving" - he's more likely to see it as a "demand" on him, and he's not likely to "be in the mood" for something like that at this point. In addition, it sounds like a fairly complicated thing logistically, so he may even be afraid of it in terms of being able to "do it right". It also requires him to know when you're about to come. I assume you would be very vocal about that and not make him "read you" - which could be pretty difficult. I know I can never "tell" when W is at or near that point.
So I guess I'm thinking that this is something best saved for sometime down the road, when the frequency is higher, and there is more intimacy between the two of you. This kind of thing COULD be pretty intimate and erotic, IF you have a good strong emotional connection... it would come under the heading of him "doing" you. If the EC is really strong, you could probably also "do" HIM at the same time. I think that's where you're headed with this, but I think it'll take a bit more time to get there. You also might consider working up to it - maybe starting with the first part where you "assume the position" and he stimulates you to O, and then you make "mad passionate love" to him normally. Then, as he gains a bit of confidence with the early portion of the "move", you show him how you'd want it to end...
Just a couple of thoughts. Again, I apologize for my earlier (non-) response...
