Sure, that's what I mean,' Doc Daneeka said. 'A little grease is what makes this world go round. One hand washes the other. Know what I mean? You scratch my back, I'll scratch yours.' Yossarian knew what he meant. That's not what I meant,' Doc Daneeka said, as Yossarian began scratching his back.

Joseph Heller's Catch-22: A Critical Edition (ed. 1973)