Making sex games is tough. Between political issues, the ESRB's ratings board, cultural differences and technical issues -- it's a war zone. Brenda Brathwaite, the encyclopedia for sex in the industry, held a few roundtables about different aspects of sex over the course of GDC. The first day was about the business side of things and one of the major conclusions was if there is anything holding back sex-based games in the industry it's collision detection software.
Some of the designers in the room had worked on fighting games and explained grapples that you see in games are all canned. Simon Strange, a designer on Godzilla: Destroy all Monsters, said, "Single point of contact between two people in games is already difficult enough. If you're going to have people having sex, there is ultimate contact. How do you support their weight? There are multiple points of contact. That is the difficulty."