Sexual discrimination is a widespread and recalcitrant phenomenon. However, in Western societies, explicit sexual discrimination, when exposed, is seldom defended straightforwardly. There is one remarkable exception to this, however. Within sports sexual discrimination is taken for granted. It is assumed that, in many sports contexts, it is appropriate to discriminate (distinguish) between women and men and to have men competing exclusively with men, and women competing exclusively with women.1 Even by radical feminists this kind of sexual discrimination has rarely been questioned. This is strange. If sexual discrimination is objectionable in most other areas of our lives, why should it be acceptable within sports?