What she expect? A pat on the head? Dean knew it would take her mind off of what she was mulling over in her pale little head, of what could she learn about watching her show or what he possibly learned about watching it. Which was mostly 'Damn HBO is a better channel'. And the quirkiness of Liv transferred over to Storybrooke. Something he would have missed.
It wasn't morally wro--yes it was. It was wrong and somewhat irrational. But the idea of getting to pop someone's head off was a good one for him. Even if he fought to actually kill someone, at least he could imagine scenarios and hope that kept the Mark at bay.
"Yes! That one." Dean's eyes widened a little before letting out a huge laugh. "Oh yeah? So offensive? What's more accurate? That one or...28 Days La--that's rage monsters. Not zombies. That one or the one with Brad Pitt and his fanned out hair?"