MistressDeeCee, I think it is in fact you who implies that the OP or those favouring a non-monogamous agreement are 'little women' and cannot possibly have autonomously consented (even though eg the OP even suggested it.)
It would be interesting how you apply your critique to my situation of a LTR between 2 women.
Since the OP wanted a bit of 'btdt' info, may I say that this thread is a fairly good representation of reactions we got from friends. Some 'get it' quite spontaneously, by which I mean understand that this is something we've decided based on our preferences and that currently works for all involved, usually giving us some credit for the honesty involved. Others don't, with many of the attitudes displayed here. (1 - You are a 'door-mat', sometimes wrapped nicely as 'You are so generous' - this towards me as I am not getting any 'action', totally neglecting it was in fact my idea in the first place. 2- jealousy will strike at some point. Well, it is not like I cannot feel jealous, but I know I can discuss this with my partner and I trust her - and myself! - to protect me by putting limits in place. 3 - It would be okay if it's only sex but feelings are so dangerous; well personally I'd be more worried about STDs and am not keen at all on sex w/out feelings for the person.)
So far, none of those who 'don't get it' have ever come around even after us trying to explain, and just as interestingly, those who do get it don't need a lot of explanation. I have not yet figured out what causes this difference.
The irony is that with the non-understanding group, I sometimes have a vague feeling that the fact that it is open and that everyone knows only adds to the creepiness factor. It is as if a good old affair would raise fewer eyebrows. This suspicion may be wrong of course.
All this is why we keep fairly quiet about it. One problem with this is it makes it harder for me to actually find someone to become involved with. The other is that friends or relatives who figure out something is going on between my partner and the OW, would of course suspect she is cheating on me, putting them in an uncomfortable position we may know nothing about.