1) On TV, people are always paired by their supposed race. It is taboo to do otherwise. 1) It appears that the notion of who is white has become more relaxed over the past decades to include almost everyone, with the one-drop rule still applying to those of black descent (TV illustrates this well). 3) People try hard to preserve their whiteness or emulate whiteness. This is seen by peoples choices in who they are willing to marry (or even date). For instance most Oriental women would prefer to procreate with a white man. Another example is Hispanic women, of whom I estimate 85% dye their hair to avoid having natural jet black hair.