Quote Originally Posted by Devils_Advocate View Post
If Roy's form has a location and an appearance and a sense of touch and Roy can use it to manipulate his environment, then it's a physical body as far as I'm concerned.
So why is this physical body unable to interact with the environment when he's floating around down on the Prime Material Plane? Clearly, whatever it is, it is not made of the same stuff that a normal physical body is, and it also doesn't have the needs of one--hence Roy is able to spend weeks on end fishing with his grandfather without ever needing to eat, sleep or pass waste.