"Are not! We're a great influence! And are you saying you care about me, Doc? Hmmm?"
He hadn't considered it from the Doctor-is-too-brilliant point of view and looks over to Ianto, seeing if he's all right with that. He doesn't want Ianto left feeling bad over how someone MIGHT have felt bad but is all right after all.
"Ooo, do you have someone in mind?" He makes a kissy face at Rose.