Thats why its so funny. It's funny how much the ESRB screwed up. SA is a great game, this will change nothing.
It will change a lot, people won't be able to rent it, and (good, moral) parents will not buy it for their kids. Violence and sex are two very different things, violence is much more accepted as we have tons of movies and television dealing with it, it's something kids are used to. However, sex is still far too taboo for a video game.