I think it's because men have a very different perception on things, like JessBuff was saying. This obviously isn't an absolute or a universal rule. Men be jealous because to a guy a girl hanging out with all dudes is in a target rich environment and for a guy who likes that particular girl, that's not a good spot to be in (under the pretense that the girl's relationship with the men is not plutonic). The latter is most likely not the case, thus men don't really have a reason to be jealous, but it's difficult for some men to overcome natural impulses.
Personally, I don't care if my girlfriend hangs out with mostly guys. If she wants to fuck them, then she shouldn't be with me and if she's not a complete moron, she wouldn't be with me in the first place, unless of course she's just some evil manipulative player bitch (no worse than the evil manipulative player asshole [the male version[). So, bascially, whatever. If she wants to hang with guys, so be it. As long as there isn't some bs invovled, it doesn't matter.
We all know how the drama rolls with chicks and to me, a girl who wants to avoid all that bullshit immediately moves up in the rankings. Ice-is-scary, you may have a point, but I don't think that your statement is universally conclusive, however, I do wonder why girls can't get along with each other...
Seriously, sometimes this whole scenario makes me think we're acting on archaic impulses of competition for sexual rights, like apes or chimps or something. I have no evidence to support this, but women competing over men (i.e. being drama queens and bitchy) may just be a more complicated form of sexual competition. Perhaps this "all guy friends" thing is a way for the modern woman to appear attractive to males? I think it's possible. I mean come on, what guy doesn't like a girl who can just chill with the guys? Seems like a desirable trait to me.
Anyways, that's my two cents.
