On principle, Castiel never works with new and “up and coming” talent. But just this once, he decides to make an exception with Dean Winchester, who he ends up bending all his rules for.
Or it was a bad photographer telling him to do stuff and he just went with it...
The thought of dean posing and being all beautiful while Crowley is directing him is hilarious.
"Give us more lips, ah, theeeeeere we go" *snap snap*