Lon started another thread a little while ago asking who ate prunes, or drank prune juice or something like that. I don't think anyone is being ageist, maybe just joking and referring to Lon's love of prunes. I don't eat prunes myself, as I don't need the added fiber but they are quite high in iron. Perhaps stirring the pot is like stirring up something else that is a result of eating prunes, which would make a stink.
My mother had a saying coming from the old country, 'If you don't want the manure pile to stink, do not poke it.' On the farms they used the cow manure to fertilize their fields.