In the first few months of our relationship, my wife and I had what one would call conventional sex. Everybody knows what it means. I'm not going to describe it here. But the truth is she enjoyed receiving oral more than everything else. In a sort of very natural way, our sex life slowly evolved to a less and less vanilla lifestyle where I would give oral on a regular basis without getting anything in return - ever. And that's how I discovered who I truly was. She broke up with me in the end. But I still feel extremely grateful because she showed me the way: I'm a proud sub and I know women deserve to be served and if you don't mind me saying so, serviced.
She was lucky to have you, good luck to both of you now! I wish my wife would like me to serve her that way more often...