Questions about Family

Is it possible for females to don the role of father and males the role of mother within a particular familial arrangement? How might the structures of our society, our government laws, and our families change if such roles were possible? Lastly, is it even necessary to title the many parental units (mother, father, mother-figure, father-figure) within some children's lives, or is it simply sufficient to disregard the title of these units if all involved are striving toward a common goal of happiness and success for those children?