Mindless

Panel One
Skull: Dinky, get off my nasal bone.

Panel Two
Dinky: You don't mind me perching on your snout, do you, Skull?

Panel Three
Skull: Actually, I do mind. I told you that.

Panel Four
Dinky: Told me what?

Panel Five
Skull: I told you to get off my nasal bone.
Dinky: That's why I'm on your snout.

Panel Six
Skull: Why do I have such a mindless colleague?

Spot the irony?