Those are duster coats.
Chriz: yo, father, can I get this trenchcoat
Father: -moralcigarette response- Besides, trenchcoats are affiliated with the Columbine Kids!
Chriz: You're stupid.
Father: HUAHUEHUAHUE
edit: forgot to mention the relevance:
I used the fact that Duster Coats and trench coats are nearly the same thing to try to persuade him.