Thunder - you have made many good points about a normal healthy happy relationship - and its wonderful that you & Sheila have that type of union.
But, sadly, that wouldn't count for at least 50% of marriages. As far as men demanding sex because they usually have to beg - this might be true. But a comment was made on control, and quite a few men have been known to use sex as a tool for control of their women (generalizing this as much as generalizing women use sex as a tool for punishment).