Well, I guess its a little complicated. 12 years ago when we met, I told her on the very first date I was a cuck, I had a small penis and was turned on by my ex's constantly cheating or being with other men. She said she was fine with all of that, and had not only cheated in the past, also cheated with a few married men behind their wives backs. But she also said she wasn't certain a relationship between us would work out, she just wasn't sexually attracted to submissive men in any way, and almost put off by them, regardless of the size of their cocks.
So for the next 6 weeks, we hung out and dated but still hadn't had sex as she admitted she still wasn't sexually attracted to me, plus my size also didn't help her wanting sex with me, so we just still hung out. She had sex on a few other dates she went on as we weren't a couple as such, but they weren't her types either. To cut a long story short, about 2-3 weeks later we had sex, it was over in a minute or so, and she just got up and went on with her day. It did nothing for her, and we both knew it was because, she wasn't sexually interested in me. In the end, we became great friends, just not great lovers, she still to this day she loves me dearly and will have sex with me if I really wanted it or earned it, but I also understand, she's only doing it for me, as a bit of a pity fuck, not because she wants to be with me.
She will give me handjobs, I give her oral quite a bit, I love rimming her while she plays with her pussy or sometimes i'll just suckle on her tits while she masturbates, and I might jerk off too. So its, almost no penetration, and to be honest because of my size, she'd prefer I fuck her ass that her pussy if she had to choose.
I wish she desired my cum as well, but she just doesn't, it doesn't repluse her, she just doesn't have any love or desire for it, so we use condoms almost always. I guess, for us there is no anger/ resentemnt because, I was ever promised anything at the start and she moved the goal posts on me, so it has been this way from the day we met. Just as I explained to her, I will always be monogamous to her aside from bi sex with the occassional male, that I was happy to never fuck another woman but I have a constant need to masturbate, and needed that in my life, I also haven't moved from that either in 12 years. So what we have today, is the same as we agreed on 12 years ago. SO I think that is why we don't have issues with it.