In fact I'd go so far as to say that if my guy's wife or my H demanded blow-by-blow details, or required that everything we did or said was open to her, I would see that as a sign of insecurity on their parts, that he or she is not able to allow us a private intimate relationship, which could create problems down the road.
Bolding/underlining by me. I think that word is key here. I was reading (and rereading) your post and Ceoli's previous post. I feel so comfortable with Ceoli's way of expecting it to go. It feels so much more... real(?) to me. But I read yours and something triggered. So in rereading it I finally got it. It's the "demanding." That is something I would definitely attribute to insecurity, just as strongly as "don't tell me, I don't want to know." (Not sure what that would be called in one word.)
I think that a comfortable acceptance of "what will be, will be" in action and conversation is a true sign of security, not a rule of either/or.
I personally don't spend any time comparing my men, and I don't share things to appease their desire to do so. (I'm not saying that they do desire to; just making a point.) I would and have immediately shut down a conversation before, when I got the impression that information was being requested for the purpose of comparing or competing.
But I do like knowing that I can tell GG, "Last night, Maca did X, and OMG it was so fucking awesome," or (as I have said often) "OMG Maca is so fucking amazing when he goes down; I can't fathom why women aren't standing in line."
GG is confident in his own strengths and he just finds it amusing. He isn't sitting there asking, "Well, what exactly does he do?" because he doesn't need or want to be Maca. He knows that I love things he does for how he does them, and I love things Maca does for how Maca does them.
I guess, for me (I know-- 5 minutes from the last post and I change the details of my thoughts-- I guess you all just make me think!

), I would prefer the freedom to talk about things, if they were pertinent, and for a level of trust that I wouldn't be sharing information that was going to be hurtful or used against the other lover.
Definitely, I would prefer a level of trust in me, that my partners would know I wouldn't be sharing information that was intended to be hurtful to either of them, or that was likely to be used by one lover to hurt the other. I would prefer that they both trust me enough to know that I choose partners who have heart, consideration, maturity and an ability and willingness to act in manners that show those things, not only to me, but to one another.