[ Sometimes hygiene is important, and then sometimes you just want to see the man you love covered in grease and motor oil. Both takes are valid, Cas thinks. But then, let's be real, there isn't much Cas isn't okay with these days. When Dean winks, Cas smiles brighter, and when he says he's done, Cas helps himself to meandering over, closing the hood and hopping right up on it. ]

Well, let me know when you're heading out, and I'll watch your back. Don't want you winding up with any more bug bites.

[ Speaking of, he pulls his legs up to sit cross-legged on the hood and opens the first aid kit across his lap, then he holds out a hand towards Dean expectantly. ]

Let's see that arm.

[ Leave it to Dean to get not one, but two injuries at the same time, one of which Cas is regrettably responsible for. Keeping the stitches clean and the bandage on his hand fresh is is the least he can do. ]