i think sam and dean just never consider using actual first aid equipment becuz john’s been using whiskey & dental floss this whole time but sam goes to stanford and one day he trips and cuts his knee pretty bad and jess helps him home and he goes to pour neat vodka on the wound and she’s like “what the fuck are you doing theres sterile alcohol wipes and butterfly strips in the bathroom” and sam’s like wait a second. maybe we are stupid.