In our case, I have the higher drive (wife) while my husband has the lower drive. We were together for almost 4 years before getting married a year ago. This is been a problem from the beginning. Right before we got married I found internet porn pictures in his computer case RIGHT NEXT TO OUR BED...we're talking hundreds of printouts. These were not extreme pictures of gorgeous, well-endowed women. They were nothing more than he could have every day (me).

He has pretty much no interest in sex at all and only participates to keep the peace. I cried when I read SSM because it perfectly described everything I have been feeling. He promised to read the book also (like your wife did) but has only made it through the first 20 or so pages.
I really wish he cared enough to make the effort