Sparkless:

Being Mother and Father is a temporary thing. In less then 10 years my kids will all be out of the house. I don't mean to dimish the importance of children, but they will occupy only a small portion of my life when compared to living with my wife 24/7 for next 30-40 years. Obviously the spousal relationship MUST be far more important.

As for what could be, why do you believe that a person could be happy in a relationship where they can never feel desired? If that was possible, then I would truly be happy right now.