By Parker Mott It’s hard to watch The Other Woman without bringing into the equation James Toback’s remarkable 1997 feature Two Girls and a Guy, a talk-heavy, one-room dramedy about two women (played by Heather Graham and Natasha Gregson Wagner) who discover they are dating the same man (played by Robert Downey, Jr.) and then conspire to make him suffer for his cheating ways.  The movie found ingenuity in the shameless rationale of its male…