[Iris is not feeling humorous, but he can bring laughter out of her even when it's a wrench; it comes up now, sharp-edged. She leans her head on his chest and runs her hands along his waist and the base of his ribcage.]

I'm a force for chaos and destruction by nature, I'm afraid. I can put this anger away. I keep it stashed for emergencies, you know; it's a brain thing. I 'it Victor between the eyes with it once; 'e didn't 'alf howl. I've seen you do summat like it.

[He knows how she works, possibly better than any human she's ever encountered. Definitely better than most - no, than any - Time Lords, and that's both bizarre and excruciatingly precious to her.]

...I saw 'im call you a contradiction. You setting yourself up as bait, are you?