There's a convention in literature that idle aristocrats have satin-smooth hands, while laboring serfs' hands have been roughened and distorted by their work. To my mind, it seemed awfully convenient that the most casual reader can discern so much about the book's characters by observing their strong jaws, or noble brows, or aristocratic hands. I always scoffed at this sort of thing as being on par with characters who succumb to fits of hysterical fainting and brain fever.
However, there really seems to be something to this soft-hands-of-those-who-don't-toil thing.
Since Robb has not been working, his hands have become freakishly soft.
You can look at the photo of my lunchtime companion (pictured above) to get an idea of the texture of my skin. I may have long aristocratic fingers, but I am a manual laborer.