But a woman, cheater or not, is under no obligation to do sexual stuff that she doesn't want to. Ever. For any reason.
Neither is a man. Agreed, completely.
So just playing devil's advocate here, but let's say a BW had a fantasy about pegging; is a wh now obligated to bend over and take it whether they like it or not? My guess is that answer would be no.
I'll answer for myself here. If I had an A, and my wife had expressed that fantasy to me before, and I denied it to her, then did it with the AP.. Absolutely, I'd ask her to do it in fact, demand it, because it's obvious I stole this experience from her and was happily willing to do it with my AP.
What if I didn't do it with the AP but it was still something my wife had expressed interest in and I'd denied her? I'd do it, for sure. Maybe I'd really like it, some people do, maybe I wouldn't and it would just be one more sexual thing that's "for her, not really for me" (oral sex, for example). But denying her a sexual experience that she wants that's anywhere in the realm of "normal" would be really hard for me to do after an A. And A is a level 9 "kink scale" activity, you're f**king another person behind your partners back. It's seriously outside the lines, stuff like partner swapping/threesomes/anal/pegging/facials, whatever, it's much more in the lines of things that society accepts that two people do together. Yes, I'm aware of "hotwifing" and that particular kink, but compared to BJs and anal sex, it's far, far less common/normal an activity. But, that's what I did (unknowingly), I participated for a few months in a "hotwife" arrangement, without, I might add, the ability to decide for myself if I'd like to participate in it or not.
Now, of course, I always have a right to say no. And "obligation" to try to fulfill my wife's sexual fantasy, affair or not, does not mean that I HAVE TO do anything. It's like of like the obligation to go to work in the morning, yes, it's part of the deal, I work, you pay, but I'm free to call it off at any time. What I'm not free to do though is stop going to work and then getting pissed off when they stop paying me.
May I just point out that the FOO crap that you seem to dismiss so readily may actually play quite a bit into why a w turns into a ww in the first place. It is just different for women - it just IS.
I get myself in all kinds of trouble when I make generalizations like this, but, I agree with you, it is different for men and women. And sex is very different for both too, I agree with that completely. My wife didn't have any of those FOO issues you mentioned, she had more "standard FOO" (Dad didn't pay enough attention to her, pushed too hard, etc). I also am lucky enough to have no really awful FOO issues, just somewhat distant parents. My problem with FOO isn't that it doesn't exist, it does, my problem is that people use it to excuse all manner of bulls**t. Guess what? We all have FOO. Yes, I do think that some people have it worse than others (in fact, I know they do), but no, I don't think it's a huge contributor in many affairs, it's just selfish, immature behavior. No need to explain it any deeper than that.
particularly healthy for either of you to have 'pornstar' sex if she is only doing it to keep you happy and not because she truly wants to.
I have no idea how to tell one from the other. It's not contempt your seeing in my posts, I love my wife; she royally f**ked me up in this particular area though, and I don't know how to "undo" it. How can I possibly tell if she "truly wants to"? She fooled me before the A, fooled the AP (didn't want to have sex with him, just wanted him to pay attention to me, pretty typical), and maybe fools me now. She certainly indicates she wants sex, but.. She did the same with the AP. Indicates she likes various kink now, but.. Did the same with the AP. The lack of honesty and authenticity both before and perhaps after the A is stunning. I simply have no idea anymore, so, I just take it as it's offered and enjoy it. Trying to figure out her true motivations/desires is just not something I'll ever be able to discern truth from lies.