Pentium I think were saying two sides of the same coin, just "it's their nature- they were that way from day one" vs. "it's their nature, eons of evolution has allowed behavior among women and disallowed it (either through men's own realizations, natural selection (i.e., those men who didn't fill their requirements, or those women who took on "male" roles, were weeded out) among men"
Edited in response to P4s last post: I think the types of flaws we're speaking about are largely flaws of human nature across gender lines... just that we have allowed it among women and disallowed it among men in greatly disproportioante degrees. The reasons for this are subject to interpretation and speculation and your mileage will vary, but I think plenty of men have it in their "nature" to be lazy, materialistic, selfish, etc... and that it is social contructs that are actually behind a man's motivation to work when he's tired, give when he'd liek to get, or act on behalf of others when he actually wants something from them. Or put simply, I think there is just as much "bad" in men as in women, but for whatever reasons men are more motivated to "fight" the "bad" within them, and women are more likely to "accept and embrace" it. I think men get into trouble for assuming in many cases that women fight the same internal fights that men do, when in fact it is questionable. Maybe because men are generally more cognitive, and that internal struggle is largely a cognitive one, so they just assume women think similarly when in fact the female thought processes are rather different? The difference seems to be that even a man who sleeps around on his wife will , when cornered, probably fully admit he was a pig for doing it- even IF she "deserved" it; whereas a woman who sexually mutilates her husband will feel that she was in the right and he deserved it... regardless of his actual infractions or lack thereof.
Regardless of how they got there though, the fact remains that women can act as they do without repercussions because the men are doling out passes instead of consequences... and I do believ that if everyone were okay with it, and human life could thrive despite it, men would act the same way. But for whatever reasons, men and women aren't okay with it, and if men WERE to act that way human life would more or less disappear from earth after a generation or two because nature doesn;t allow for it either.
So how many men out there would actually get a huge kick out of smashing a fake set of tits with a broom handle shortly before they marry a woman? I just don't think many men would find that funny or get a rise out of "sticking it to women" (no pun intended) that way? I really don't think too many would, and I don't know of any industry marketing such products as the "perky pair pinata".