I think it would be good for Sir Paul- obviously the man is a wealth of talent but maybe Keith would do for him what John used to do- offset his tendency to be a candyass and tell him he's full of shit when he needs it!!
funny how the story is being spun. it appears as though paul and keith wrote a proper song together but for all we know it could have been something silly done as a lark. keith playing two chords over and over again and paul singing ingredients off a package of cookies.