Ever since Cas had expressed deep disappointment about Dean not being able to experience his true form or hear his true voice, it had been weighing on Dean. Not because he was not enough, or faulty, or somehow not the Righteous Man Cas had always trusted him to be. It was more personal. Selfish. Greedy. He wanted to see Cas in all his mighty glory, but there just wasn't any way to accomplish that, unless he wanted to have his eyes blackened and burnt out of their sockets. The thought alone made him shiver. He valued his eyesight pretty highly. It had saved him from many a trouble, and would preferably continue to keep his peepers intact, thank you very much. But the yearning was still there; Dean may have Cas in his bed, as his lover, as his confidant, as his life partner, but that wasn't all of Cas. It was the human form, and the knowledge there was infinitely more to him was eating Dean alive in moments he forgot to not think so very deeply. So the morning Dean woke up unreasonably