How Should I Talk To My Wife?

For the happily married women here: I love my wife of 25 years. but how do I explain how important oral sex is for me? I feel selfish.
My wife doesnt like it, or at least has to be asked and I am very shy about it. It makes me crazy mentally and I am quite content in all other areas. She will do a little if asked, but doesnt finish, and thinks she has really done something special. I feel deprived. I feel even worse for not complaining, but I bring it up every few years that it would mean a lot. How do I discuss this? what if she really does hate it. Am I being TOO considerate? Would love to have married women's perspective only please.
lateguy lateguy
56-60, M
Dec 15, 2012