“Sure,” I said right away.  I was only too glad to get up and do something.  I took her dress over to the closet and hung it up for her.  It was funny.  It made me feel sort of sad when I hung it up.  I thought of her going in a store and buying it, and nobody in the store knowing she was a prostitute and all.  The salesman probably just thought she was a regular girl when she bought it.  It made me feel sad as hell—I don’t know why exactly (125).

            Discuss the significance of Sunny’s green dress.  Are we to believe that Holden doesn’t “know why” he feels so sad? How can you account for his sadness?