Why is it that when Brian Williams makes up war stories he loses his reputation and six months of his career, but when Bill O’Reilly spouts the same sort of chest-pounding bull, he ends up even tighter with his audience and his network?

It’s not as if O’Reilly’s fabrications were less outrageous than Williams’s. O’Reilly has claimed he was a heroic network correspondent in the “war zone” (meaning Buenos Aires) at the end of the Falklands war while his CBS colleagues were “ hiding” in a hotel. More Zelig-y than Williams, O’Reilly has repeatedly placed himself at the Florida front door of a shady figure in the investigation of JFK’s assassination just in time to hear the self-inflicted gunshot that ended the man’s life (when there’s a cascade of evidence that Bill was in Dallas at the time).

When Media Matters debunked O’Reilly’s claims to have seen four nuns “get shot in the back of the head” in El Salvador in 1981, he slickly skated away, saying he meant he had seen images of that slaughter and that “no one could possibly” misunderstand his sterling intentions. The latest of O’Reilly’s fairytales to fracture is that protesters bombarded him with rocks and bricks during the 1992 LA riots; not so, say colleagues who were there.

Not in spite of, but because of all this, O’Reilly’s TV ratings this week have surged, as fans rally to him and the curious tune in to see if the cable news giant will admit to even one substantial fib. Of course, he won’t. After countering the Falklands charges on Sunday with a misleading clip, he’s been brushing off the other charges as baseless political assaults from “liars,” “far-left zealots,” and “guttersnipes.”

Unlike NBC and the other networks, which at least aspire to fact-based reporting, it’s in Fox’s DNA to re-invent reality by massaging facts and destroying context, because, as Jon Stewart said, all that “matters to the right is discrediting anything that they believe harms their side.” One of the central tenets of Fox News is that conservative white men are under constant attack from the liberal media, and the O’Reilly flap, which was initially kicked off by Greg Grandin in The Nation and then David Corn in Mother Jones, fits that narrative all too well. (As Grandin and others point out, O’Reilly’s personal pufferies are the least of his reportorial sins.)

No matter how accurate the hits on O’Reilly’s false machismo are, they only make him seem more righteous to his audience. Liberal attacks on right-wing manliness—like pointing out the chicken-hawk status of Cheney & company—have no standing with Fox viewers. “O’Reilly has been given an opportunity to wage war against a phalanx of liberal media aggressors,” Gabriel Sherman writes in New York magazine. “This is what his audience expects.”

Is there nothing that could turn their audience away from them? Doesn’t Fox, like the rest of us, have an Achilles Heel?

Actually, they do, and it’s related to that tough-guy, manly-man act. Conservatives can bluster and bully like steroidal hysterics on any topic, but when they turn their scorn on an individual, usually younger, woman, they risk the ire of Christians, Republican women, and anyone with a working creep detector. As Sherman writes:

One indication that O’Reilly is waging a calculated media campaign is to compare his ferocious response to a true scandal with career-ending implications: the 2004 lawsuit by a Fox News producer named Andrea Mackris, who accused O’Reilly of having lurid phone sex. In my biography of Ailes, I reported how Ailes and Rupert Murdoch were furious at O’Reilly for creating the humiliating mess. Ailes instructed O’Reilly that if he spoke out in public, he was in danger of losing his show. Aside from a handful of muted comments, O’Reilly remained silent about the allegations. His ratings held, and O’Reilly hung on to his job.

Likewise, Rush Limbaugh was seen as pretty much invincible until he, too, attacked a younger woman. In 2012, he called the then–Georgetown University law student Sandra Fluke a ”slut” for supporting mandated contraceptive insurance coverage. “She wants you and me and the taxpayers to pay her to have sex,” he said. In return, he added, he wanted Fluke to post videos of her having sex “online so we can all watch.” Advertisers began to flee the show, to the point where, according to Media Matters’s Angelo Carusone, “the commercial viability of Rush Limbaugh’s radio program has collapsed and remains that way.”

From O’Reilly and Limbaugh to Todd (“legitimate rape”) Akin and James O’Keefe (the GOP prankster whose plans to lure a CNN reporter onto a boat, and seduce her, in 2010, signaled his serious fade-out), sex and gender snafus appear to be one of the few reliable forms of white male kryptonite. You catch a right-winger making his sexual appetites overly vivid or venting them on an identifiable woman instead of an abstract policy, and boom!

That’s the burden of being “the Daddy Party,” and if it faces a “Mommy Party” headed by Hillary Clinton in 2016, it will be a particularly heavy one. If they launch a sexually aggressive campaign that backfires, they’ll surely feel victimized all over again.

Until then, Bill O’Reilly is safe (contrary, I think, to Maddow’s take). He and his viewers are in this together. They need just a drop of plausible deniability (Bill couldn’t have lied—he showed us a tape!) to go on accepting his nightly rants. Part of Fox’s contract with conservative Americans is the right to think magically and to (as Karl Rove told Ron Suskind) “create our own reality.”

Bill can hear a magic gunshot. He can experience war in an upscale downtown neighborhood. He can get hit by make-believe bricks.

And, for now, he can Houdini himself out of all the traps he’s set for himself.