The laws of meat and milk are explained in Yoreh De’ah, for that is their place, but I saw that the Bach wrote here as follows: "it implies that when they do not recognize one another they may eat on one tablecloth, and he wondered, etc., that perhaps meat and cheese might stick together on the tablecloth, etc., and it seems to me that here it speaks of a new tablecloth or one that was well laundered, and this one eats at one end and that one eats at the other end, so that they do not touch each other, and it is obvious; furthermore he wrote that when one places a meat bowl on the table and afterward places a dairy pot in its place it absorbs the taste of the meat absorbed in the table, etc., and forbids to the extent of a peel’s thickness" but we do not hold this way as written in Yoreh De’ah at the end of siman 92 that absorption does not transfer from vessel to vessel; and there are those who have the custom to wash between cheese and fish, and this came from what the Beit Yosef wrote in Yoreh De’ah siman 87 that it is dangerous to eat cheese and fish, but it was already written in the Darkei Moshe that there is a scribal error there in the Beit Yosef and it should read fish with meat, see there, and so wrote the later authorities: For it is difficult according to another view, and it is possible that nowadays there is not so much danger, for we see many things mentioned in the Gemara as dangerous because of evil spirit and other matters that nowadays are not harmful because the natures have changed, and everything depends on the nature of the lands, and see Yoreh De’ah 116:3 and Even HaEzer 156, and so wrote the Bach in the name of the Rambam.