Love and sex are certainly things that are colored by those tinted glasses, that's for sure.
Love yes, for sure. Sex.. Not for me (which is why I hang up on this issue, and I suspect that others do as well). Do I think my WW looks back positively on the sex? No, I don't, in fact, I'm pretty sure she doesn't. But do I still wonder if he was bigger, made her orgasm harder than she ever had before, was hornier, more eager? Yes, I do, because to me, that indicates more desire for him and that his mechanics and techniques were better than mine. I don't want to be 2nd best with my wife, not from the perspective of "the overall man" but in general. And that's hard because, speaking for myself, I've had some "OMG" sex with people in the past that still comes to mind today. Mostly is was acts (things she'd do) and enthusiasm, but, without being too crass, other times it was just better "physically". I remember those experiences to this day, and, it makes me sick to think that my wife could feel the same way about her AP. "Oh man, if only he was hung like AP, this would feel so much better". I would bet my life that thought has crossed some WW's minds, they may not want it to, they may try to push it down, but there are women who've thought that, no doubt (and if there is doubt, go read on Whisper for awhile about affairs and prepare to have your soul ripped out of your body).
There is no answer to this. And it's not just women, the one I've heard from men is "so much tighter" and they way that translates to discover is "does she have kids". We all have this fear, and the fear becomes so much more debilitating when there's no way to fix it. OK, he sent you flowers every day, I can do that. But if he was hung like a bull and made you orgasm like you never have before well.. I can't do that, just like I can't suddenly be 6'5" tall. It's like a part of them that you can never get back, that will always be there, even though I believe they that NO WS who's remorseful wants it to be, it's still there.
Also, part of the problem, at least for me personally, is that I know how men talk about their AP's. And it's not "she's such a great person", it's "wow, she is so tight/wet/etc" (compared to my W; not said, but implied). So I know these comparisons happen, and I know that it's not only 4' tall, fat, bald men with a micropenis who wind up in A's. So some of us are being lied to, and when you know that to be true, it's hard to figure out what to believe and what not to.