Watching my man cum is it's own reward. This gets me every time. Makes me weak hearing his breathing, his masculine sounds, his voice and breathing changes and then if I'm lucky the grunts and eye rolls as he lose it. Yeah, this is for me too.
Intimacy is not just physical. To crave a persons presence and energy rather than just their body is the purest form of intimacy. Play like the universe relies on it.
Do it because six months from now, you will thank yourself. Sit him down and make a couple of new rules that will serve you both. You will be glad you did.