Life is full of choices and sometimes the best way may not be the right way. We've all had this moment where we are stuck with the two very different sides of our conscience. There's always the pure side and the tainted side, both who are expecting us to choose their path.
It is my belief that, since we are all human, we are forever trapped in the shades of grey because it is impossible to always agree with one side. Thus, the girl in the middle is shown with aspects from good and evil. For example, her shoes are red while her blouse is white. However, the white blouse is covered in shadows and her shoes also have a golden lining.
It's also at times like this, where you want both of them to quit nagging at you long enough for you to think of a different option. It's quite irritating and I think they are both in the wrong for putting their two sense in everything.
This was alot more complicated than I intended, but I love the result