Breaking the Code

So this guy I know tells this friend of mine that he's cheating on his girlfriend with a married woman. So my friend tells his girlfriend about it, who tells another girlfriend, who tells the guy's ex-girlfriend, and then the guy's current girlfriend stupidly calls the ex-girlfriend for advice about the guy, and the ex-girlfriend tells the current girlfriend that her boyfriend is bonking a married woman behind her back, and thwap! splatter! whirr! the shit hits the fan.
Who is the guy most upset with in the chain of tittle-tat: the ex-girlfriend who told his girlfriend? the guy he originally told who started the chain? or everyone in the chain?
Turns out his most upset with his male friend for starting the chain. Why? Because his friend "broke the code."
What is the code? The code is you don't tell a member of the other gender that a member of your gender is up to no good. It's about gender betrayal. Guys have to stick together against chicks.
So, in this Code of Tight-Lipped Men, if Dubya bonks Condi behind Laura's back, and tells Dick, and Dick leaks it to Karl who leaks it to Bill Frist, who tells all the guys in the Republican Party, and pretty soon every last man in America knows that Dubya is getting it on with Condi, but NO WOMAN does, the code has held and Laura will never know.
There you have it, guys. Some knowledge you can pass on to a total stranger, as long as he's a guy. But never tell a woman -- even your girlfriend -- because you will be Breaking the Code of Tight-Lipped Men.
Is there stuff that women know that men never will because there's a code among women, too?