It does bother him, a little bit. There's something inside Strange that makes him feel sick to his stomach every time he orders Childermass or forces him to do something. But, instead of thinking it through and realizing just what that horrible feeling is, it's so much easier to attribute it to the poison.

Strange continues to collect his notes, still making a mess of Lambert's additions. "It doesn't bother me in the slightest. I told you already, you need to stop thinking about the changeling like he's you or me. He's not even human to begin with."