This isn't the topic Crowley wants, though. He wants to talk about the way Aziraphale is allowing his touch, the way he kissed his forehead. Wants to ask how much more he's allowed.

The thing is, Aziraphale doesn't like to talk about it. They've made it this far by guesswork and Crowley wouldn't be surprised if they make it any further the same way. Clumsily testing each other's boundaries without discussing it at all.

He resigns himself to this, and scrunches up his face as he thinks about what would specifically answer Aziraphale's question properly.

"Doesn't even last half an hour, angel, only works on me -- can't make anyone else look different. Just an illusion, too, not a real change."