[He ends up staring. He knows she's trying to make it seem not so bad by comparing their situations. She can never be touched and for awhile, he could never be seen...]

You're not a monster, Rogue. But... just look at me. If the tail and fangs weren't enough, then there's that brimstone dimension, and now the glowing eyes and shadow thing? What am I? This can't just be a mutant thing. What kind of 'accident' causes this?