Agreeing with CVA, Heim -- nail on the head regarding control & fear. I was afraid of being wrong about things and looking/sounding like a fool, idiot, etc, simply because I should be right (I'm educated, afterall! ). Also, because I was insecure about my not being a Mr. Fix-It, a-typical man, I felt I needed to make up for it by excelling in other areas (such as knowledge).
This was all driven by a fear of not being adequate in the eyes of my W -- I never thought I was better necessarily, but felt like I NEEDED TO be better so I could be worthy (adequate). Fear & insecurity are the driving forces of controlling behavior. At least, they were for me.