Power and power differentials seemed to play a role in the consensual relationship at the heart of the Petraeus scandal.
But they may also be a factor in the troubling incidence of sexual harassment and rape among our nation's armed forces.
Helen Benedict has spent a career looking at sexual assault and abuse in the military.
She's a professor at Columbia University's School of Journalism, and the author of "The Lonely Soldier: The Private War of Women Serving in Iraq."
Benedict says relationships in the US military are especially prone to abuse because of the huge power differentials in the chain of command.