You're Dean's kid, and a sort of junior hunter in your own right. Dean lets you accompany him, Sam, and Castiel on hunts. But, as any good hunter knows, hunting can get pretty gross sometimes.

So when you four come back from fighting some particularly disgusting undead, Dean takes one look at you, covered in monster goop, he snorts and grabs the back of your shirt, starting to drag you along to the bathroom.

"You're a goddamn mess, kiddo." Dean teases. "You smell like a ghoul. I guess it's bath time, huh?" He laughs, clearly having fun exerting his dad-ness. "Let's get you squeaky clean and lookin' more like a Winchester and not a scruffy puppy who's been rollin' in roadkill."