Thankfully (maybe thankfully) Dean actually saying something coherent brings Cas back to himself and he stills, panting and shaking and feeling very humiliated.

Cas swallows. "Sorry," he says, and tries to extract himself from Dean's arms. He's not sure what he's going to do about this problem but hey, there are some primal urges giving him a good idea and even without that horrible learning process called puberty, Cas thinks he can handle it.