[He tries to imagine it, really imagine it. Put himself in those shoes, to not feel anything, ever - his hands tighten on the ends of his towel, and Erik has to tell himself he wouldn't feel that. Nathan didn't just say pain, and even that has its downsides. He still gets hurt.

All in all, Erik's glad his mutation is what it is. It has its downsides, but better those than not feeling anything.

Fortunately, he's very against pity as a function of society, so her doesn't gentle his expression or give Nathan a sad look. He crooks his mouth instead, shrugging innocently.]

It would be a fascinating experiment. You'd be able to give detailed descriptions, I'm sure some scientist somewhere would appreciate that.