It's almost exclusively about the frame of MIND while doing the act.
I get your point. You don't want your W to do it because you ask but because she WANTs to. Well, that is a tough one Cemar. Not something you can control. Only she can decide that for herself. BJ's are not my favorite thing in the world, but I do them sometimes just for novelty to put something else in the bag of tricks, and sometimes because it is just great to see a man experience that pleasure. But if I was having no attraction to that man, BJ's would be one of the last things on my list. Hmmm...maybe you can rate the degree of happiness in a M by number of blowjobs. One or more a month - very happy. 2-5 a year - could be trouble in paradise. none - dead on arrival.