Castiel is eager to learn, especially in this area that's eluded him thus far, and an area so mired in free will, dependent as it is on desire and choice. He desires Crowley -- surprisingly enough -- and he chooses to have sex, just as he chooses to follow Crowley's orders here, in this moment. He doesn't have to, and Crowley would probably like it if he misbehaved, come to think of that. Perhaps later. Right now, Castiel wants to remove the rest of his clothes, so he can do so while complying with Crowley's wishes.

Has he ever taken these pants off before? He's distracted by the thought and the sight of his erection, which he's felt before but not seen for himself. When he lies down, it rests against his stomach, and Castiel suddenly feels quite vulnerable. Strange how he hadn't until now, when Crowley could have harmed him at any point. Unsure of what to do with his hands, he lays them over his chest.

"Now what?"