Re: Why my wife doesn’t ask me to perform oral sex on her?
A lot of (most of, imo) women aren't naturally sexually aggressive. Especially since most ladies grow up and date being the pursued instead of the pursuer. But i think that if you act submissive towards someone, that person usually ends up acting a least a bit more dominant.
So i think if you want to wife to be more dominant in regards to oral, you should behave more submissively. I know that can be a tad difficult for a guy to do, since it's not really the norm.
But the first thing to do would be to change the way you ask her. Instead of saying "can i give you oral?" say something like (kinda graphic) "I love being between your legs satisfying you, it turns me on so much, please tell me i can do that for you." That sort of put's the power in her hands and you can eventually work your way to saying "i love it when you tell me lick you."
Also, change the way you give her oral. If you give it in a dominant position now, her on her back. The try giving in a more submissive position, her in a chair you on your knees. Again, it gives her the power and a bit more control.
You may never get her to outright ask you give her oral, especially if she's very shy naturally. But you can get close to that and help her feel more sexually powerful/dominant.