Welsh cuisine butter was the primary cooking medium and basis for sauces. Salt was an important ingredient in Welsh butter, but also in early Welsh cheeses, which would sit in brine during the cheesemaking process. The Welsh were also early adopters of roasting cheese. An early incarnation of Welsh rarebit was being made in medieval times, and by the middle of the 15th century rarebit was considered a national dish. The acid soil of Wales meant that the milk produced by their cattle created a soft cheese, which was not as good for roasting, so Welsh people would trade for harder cheeses
Toast be attributable to the combination of the size of the toast and the height of the typical dining table, which means that the toast will not rotate far enough to right itself before encountering the floor. A joke that plays on this tendency is the buttered cat paradox; if cats always land on their feet and buttered toast always lands buttered side down, it questions what happens when buttered toast is attached to a cat's back. In the first episode of the third season of the Fox musical dramedy "Glee", "The Purple Piano Project", Becky questions the necessity of toast,