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Written for deancaskink: "Dean and Castiel are both angels and brothers-in-arms. During a battle, Cas's wings get hurt and [it's] up to Dean to help him out. In the process, Cas finds out how sensitive his wings are and well Dean is Dean no matter what his form [is], so this leads to lovely first time sex." God never made humans. Instead, he made the angels in his image, and on the sixth day he made the ishim, and gave them free will.
- Part 1 of Rules of Creation