Dramatic Flare said:
"...be a man and stop complaining..."
Honestly, I think you're just being the pot and calling the kettle black. your opinion is just as neanderthal as the rest of ours.
More on your post, I would have agreed with you about two years ago. You're right, I was dumped and she thought someone else was more worthwhile. You know who didn't leave me for, "someone more worthwhile? my friends, my "bros" if you will. The point this, "neanderthal" idea brings up, as you put it, is that your friends will be there for you long after every woman, or man as the case may be, has left you for someone else. In this case, why shouldn't I consider my lady friends in the "bro" group? They're not leaving me because they found someone, "better," but then again they aren't the "ho" of the situation.
I can't count groups where partners are traded more frequently, but from what experience I do have, you're making them out to be way more peaceful than they really are. Sure, they put on a brave face in the group, but you have no idea what goes on behind closed doors. I've seen entire one group dissolve over a situation like the one you described.
Maybe your group just managed to figure out their problems, but I would hazard a guess it's not the norm.
Perhaps the group I was a part of dealt with it better. I don't know, as I've never been in one that fell apart over something like this.
Maybe I am being just as Neanderthal, but I just don't understand this "rules" business. Every situation is different. If it bothers you, you talk to the guy before anything happens. But what if it doesn't bother you? I mean, this situation is different as the "other" guy is in a relationship. But what if it didn't bother you and your mate missed being with someone he could have really gotten on with, just because you "might" have a problem.
I'll give you a personal example, I was going out with this girl for about a year and a half, we broke up (okay, I dumped her, so its not as applicable) and about two weeks later her and my best mate started scoring, and, well other stuff. Didn't bother me in the slightest. They went out for ages, maybe 2 years or longer, though eventually broke up. They travelled the world together and She helped him through his father's death from cancer. Now, if he had just not gone near her because of a misplace loyalty to me, things could have gone very differently. Then again, that same guy broke up with a girl last year, and she came sniffing around me, and I just put a stop to it because I knew he still loved her and now they're back together.
I just don't think you can have one rule for every situation.
The girls in the bros groups, was more a point about the offence of the phrase to those same ladies than it was about them leaving you. But I do concede your point.