Games are designed to make money (they may also make meaningful statements as a bonus but I don't think any game has ever been designed not to make a profit...). The horny heterosexual male has proven an especially profitable demographic. Shove in some sex appeal and they buy it in droves. While women certainly have the capacity to be as dumb as men, until they have demonstrated the willingness to be as stupid and easily led on mass there seems little need for games to pander to them as well. And last time I checked Playboy was still outselling Playgirl, My spam filter was still overflowing with male rather than female enhancement spam and female objectifying porn was still the most popular and profitable thing on the internet. If the goal is equality we do not need male NPCs in thongs we need more stupid horny women with cash...