Listen, America, if you want your leading men to play robots or dudes with superpowers, Michael Fassbender isn’t so Stanislavsky that he’ll roll his pretty Irish eyes at you. But that’s not why he’s the most exciting leading man to emerge in years. It’s because he dives into roles that would make most Hollywood himbos piss in their loincloths: a hunger-striker, a sex addict, a vicious slave driver. Why does Fassbender push himself to such extremes? To find out, GQ’s Zach Baron rode shotgun with him and barely lived to tell the tale.