Castiel may not need the praise, but it clearly doesn't hurt his enthusiasm. The way he pulls Crowley closer is a good sign for the future. He's definitely trainable.

Crowley's hands tug at Castiel's belt, using it to help erase any space left between them as he pushes Castiel back towards the bed. He'd really like it if they could lose their pants this time. Castiel comes in such a pretty package and he's such a fast learner. Crowley wants to see just how much he can pick up.

Once they're nearer to the bed, he pulls back enough to open Castiel's fly. "Finish undressing and lie back on the bed."