From the interview...
EM: The U.S. version is going to be different than the European ones?
DC: A little bit, yeah, because of the sex scenes. The European versions are exactly as we wanted, but we had to change some things for the U.S. market.
EM: Was that so you could get a certain rating?
DC: Yes, 16+ was the rating we wanted. Otherwise it would be 18+ and people just told us our game would only be available in sex shops with that rating. There is nothing sexual in it that you wouldn’t see in a regular movie. But that is what we were told.
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Yay thanks for fucking up my genre America. We got these Europeans making amazing cinematic games for us and they can't even do what they want for fear that it will end up with an AO.