A BS who allows himself to get hung up on what the WS did with the ap is slowing down his own healing. A BS who chooses to want what the ap got is keeping the ap in the M, and it just doesn't make sense.
My post was not tactful, somewhat intentionally, somewhat because I was tired.
Here's the difficult part of what you said, while I agree with you, doing things for the "sake of it" or because the AP got it, I'm on board, that doesn't make a lot of sense. But getting down to the details, I feel like that doesn't exactly hold up. Because when this situation pops up here (and it hasn't in awhile I'm kind of surprised actually), it's not a BH coming on and saying "AP got X, now I want it" it's almost always (actually it is always, I've never seen an exception, although I'm sure one exists), "I wanted to do X with my WW, and she told me no, then did it every time she met the AP". Is it about "reclaiming" sex for the BS? Yes, in some ways it is, but it's also that this was a desire that was shot down by the WS.
So, let's make an example, somewhat funny, but also not all that ridiculous. WW gave anal sex to the AP. Husband had always wanted to do it, made that desire known, and was rebuffed. This is the most common situation that I see, sometimes it's BJ's, and sometimes it's oral sex (with a female BS), but those 3 things probably encompass the majority of these discussions. Thing is, a woman wanting her H to go down on her, if expressed before the A (or even not expressed, but wanted) has nothing to do with the AP. Or what the H did, other than to make the A hurt worse. It's not a desire because he did it with the AP, it's a desire that was always there, and has been made very raw by the fact that it was denied to the W, but given happily to the AP.
Now, the other situation. Same WH, has scat play with his AP (look it up, but don't do it from work). BW has no interest in it, even after discovery, it's just not something she wants to do. Should she do it to "reclaim it"? No, IMHO, she shouldn't, it's not her thing and she doesn't WANT TO reclaim it. And I put that in caps, because that's really the dividing line, do you, the BS, want to do these things with your WS because you want to do them, or because the AP did them? If its the first, then what I said, I stand by. If it's the second, then.. I think what you said is more reasonable, don't do things because others did them, do them for you.
Thing is, it's almost never that. The things my W did with the AP that I have no interest in I've long forgotten. The things she did with him that I'd always wanted to do? Those are with me to this very minute. I'd never want to do the things they did because they did them, I want to do them because I've always wanted to do them, my WW just wasn't willing.
But I can't figure out how anyone can say, 'You gave it to him' without whining, and I don't see whining as a winning negotiating tactic.
Neither can I. Which is why I think these threads are valuable. Hopefully WS's read this and realize "I need to get with the program" and realize what their refusals did to their BS, and how to fix it moving forward. And it's not to pretend it didn't happen. And it's not to explain away why it happened. It's to have an honest conversation, and be open and engaging with your BS. And I just don't think that message gets delivered clearly.