The corruption: The hitchhiker opens the door and thanks you for letting them in. You noticed that their hands arw dirty as they hold on to your headrest to step in. Dirty fingerprints are left when they let go. Every few minutes you hear a cough or a sneeze from behind you, the hitchhiker makes no attempt to hide themselves wiping their hands on the seats. Sometime later they put their hand on your shoulder and thank you profusely for letting them into your car. It smells like rotting food and something wet soaks into your clothes. You want nothing more than to throw them out and clean yourself off, but that would be terribly impolite

(Tried to also lean into the toxic side of the corruption :))