I think it would be interesting to see, because The Parasite absorbs by touching, not incidental contact. He has to grab and attempt to do so. With the Hulk's ablility to get stronger, and the Parasite's ability to absorb his powers this could go on for a while. If the Parasite absorbed sufficent energy from the Hulk to out muscle him, wouldn't Hulk get madder? In effect getting stronger, will the Hulk be able to understand that grabing purple man makes Hulk weak? Can the Hulk keep powering up, or will the Parasite find he does have a limit? I just think it could be cool to debate/see.