We'll begin with box, the plural is boxes, but the plural of ox is oxen, not oxes, one fowl is of goose, but two are called geese, yet the plural of mouse is never meese, you may find a lone mouse, or a whole nest of mice, but the plural of house is houses, not hice. If the plural of man is always men, why shouldn't the plural of pan be pen? If I speak of a foot and you show me two feet, and I give you a boot, would a pair be called beet? If one is a tooth, and a whole set is teeth, why shouldn't the plural of of booth be called beeth? If the singular this and the plural these, shouldn't the plural is kiss ever be keese? We speak of a brother also of brethren, but though we say mother, we never say methren. Then the male pronouns are he, his and him, but imagine the female, she, shis and shim. So, what?