Thanks for replying. I don't have time to respond to all of your points, but as a response I'd encourage you to try to see if you can find a difference between something like Picasso's/[insert artist here's] Nude paintings, and a Playboy photoshoot of a glamour model.
Yes, all games are for gratification (well, some arthouse games aside), but not all games that contain nudity/sex are for sexual gratification. I doubt people toss off to Outlast, for example, and that contains nudity/sex references.
Anyway, I wasn't looking to get into an argument about this, I was simply seeking an answer from someone who might have some authority as to whether or not there is special tagging for games that contain sex and nudity but aren't porn games (as I've never released a game that contains nudity before so I wanted to get it right), and whether they're filtered differently on the site.
From what you've said at least, it sounds like there is no difference insofar as tagging and filtering is concerned, and that a game like Outlast would be lumped in with porn games. Again, I'm not criticising this - I'm not even interested in getting into a debate, to be frank - I'm just trying to ensure that I tag my game correctly.