((Actually I was waiting for you...))
One COULD argue thus and certainly it may be true in some circumstances...such as Cain and Able, however other theories persist.
Such as the alphabetical order in which "Men" and "Women" appear, both equal, as you eventually pointed out.
Cain and Able would seem to appose this, however in this case, the one who was the idiot is mentioned first, the surviving of the two. The most famous of a story is usually mentioned first or the surviving of the story in this case.
Adam and Eve is alphabetical, both being equally dumb for believing the serpant and eating the fruit.
Sademn and Gamora, I have no idea on...
Other examples ellude me, however, I severely doubt order gets too important once you stray from the sterotypical path. We say "Men and Women" because that is how we've been taught. If the world said, "Women and men" we would be able to say that in our mind FIRST without effort or coincisously.
It is all a matter of conditioning of the mind's connections with other things. We are taught THIS is blue, however to someone else, it may appear green or white, though they recognize it as blue. It may be that some day we realize the eyes of one person sees a world of purples and yellows instead of blue and green as I see it.
It is all a matter of perspectives...and it something mankind, or humankind, will never be truly able to understand the affects of the world around us has. Each of us sees something different, a human factor and condition not all together bad.