 (3) The lack of distinction between sex and gender makes it hard to classify cases such as this: X is attracted to Y who is anatomically male (sex) but who presents herself as a woman (gender). Assume that X’s own gender and sex are male. Then, whether we claim that X is gay or is straight, we face obstacles: if X gay, X would not be attracted to someone who appears as a woman. If X straight, X would not be attracted to someone who is anatomically male. The popular concept of orientation leaves such cases unclassified (Corvino 2006a; Wilkerson 2013).