And while they were never romantically involved - both had long happy marriages to other people - Betty Comden told NPR in 2003 that she and Adolph Green had a set routine over the course of their more than 60-year collaboration.

NPR: Songwriter Betty Comden

All of this, of course, is routine turf protection in the business world.

WSJ: Augusta: Look but Don't Touch

Of course there are some routine problems and disputes but on all the issues of principle our positions practically coincide.

BBC: Breakfast with Frost