"Sex saturates most forms of popular culture entertainment – music, film, anime, internet, literature, advertising, TV, theatre – but is curiously absent in games.
Are gamers scared of sex? If you look at the last 20 years of commercially released computer and video games, the only conclusion you can draw is that game players are absolutely terrified of (it). Only a handful of thousands of games have contained sexual content, and when sexuality is occasionally used in games it invariably causes controversy and moral panic." - from gameplayer