I imagine nearly rotten apples with the one good square inch cut out and dropped in a fruit salad, or half rotted lettuce being rehab-ed with a sodium chloride rinse. . . yech!
Yeah, that’s what I thought about also. Someone could go around people’s houses and teach them the proper way to cook dishes they keep messing up every time they attempt to cook them. For example, someone could be standing over me while I make hollandaise sauce and teach me how to keep it from curdling.