I have tried to explain to him that he's not the only one left feeling this way by the work I'm doing.  Grading puts me on the floor, too.  (If he would just help, perhaps I could get done more swiftly, though my father's theory of dog help--which is that dog help is worse than no help, since at least when the dog's not trying to help, s/he's not getting in one's way--suggests otherwise.)