Savage Love Letters of the Day: Quick Hits

I'm 40, happily married for 10 years, with the wife for 20 years. We have a good marriage, we're great friends, we have two kids, a good life. But my wife refuses to give me head. Flat out says no. Won't do it. We have talked about it and she says she doesn't want to and nothing I can say will ever convince her. I have tried denying her oral sex, I have tried not asking, I have tried begging. Nothing works.
I don't know what to do. Everything else is fine. I don't want an affai