Nevertheless, here is the best thing I've read about this so far:
I have no idea what caused David Petraeus to cheat on his wedding vows. I can't say I care. I also can't say I'm surprised a powerful man who spends weeks and months away from his wife fell into the arms of a younger woman who both adored him and was near him. Dude is human and adoration is pretty powerful (I would guess).
The surrounding farcical cast of characters makes this somewhat amusing, I guess.
But I have to echo Chuck Klosterman: what have I learned? Not a damned thing.
UPDATE: This is pretty good, too.