Cas is in love with humanity. The way humanity smells in the morning, the way humanity hums sweet melodies in the shower when humanity doesn’t think anyone can hear him. The way humanity always puts everyone else first, making sacrifices and saving the day. He loves the way humanity laughs at his own stupid jokes even though they’re not funny, and when blushes when their gazes meet. Castiel is in love with humanity, and this humanity is named Dean.