I see nothing wrong with a woman doing this for her man out of consideration and love. Same for giving oral. Relationships are about compromise and sacrifice. I mean woman today want men to commit to marriage, visit the in-laws all the time and give up so much in order to be with them but they can't take a shower and let their man go down on them and pretend to like it? They can certainly fake liking intercourse and even having an orgasm. That said, I am a man who gains great enjoyment from pleasing my partner. If she seriously had an aversion to it she couldn't overcome, I would respect that, but I would not pretend I wasn't disappointed. I would probably try to get her into counseling to resolve it. I liken it to a man telling his woman that he just likes quickies so she is out of luck if she never orgasms.