Now I know at first you don't thik of this as a dirty job, but think about kids farting in your face, peeing in thier pants and not telling you until you try and spot them, baby puke, screaming and crying, not to mention the clean up process of keeping a sanitary work place. Plus you can see how dirty a job spotting can be. If a kid has had beans for dinner, you better wear a gas mask! I know, I taught, and being a satisfying job, it was dirty.