[It does sound a little like Kratos is implying that. Yuan frowns some more on general principle.]

With what am I going to have to bribe you to actually bother to shave?

[It isn't that he's given up, really; this isn't an admission of defeat, as he can just as easily resume his previous tactics. But it's a waste of time and effort, and he had hoped Kratos had less determination to his spite than that.]