well its got alot to do with this being a U.S. company probably and the U.S. rating system on Movies and litature (spelling) Puntomaus: G - Gerenral Audiences, al ages permitted PG - Prental Guidance Suggested - Some adult material such as foul language. PG-13 = Partents strongly cautioned - Adult language, Mild Nudity PG-17 - Adult situations, Adult language, Full Nudity. Extream Violence (i.e. a good example of extreme voilence would be those popular first person shooter games) R - Adult situations, Adult Language, Full Nudity, Mild Sexual Acts (lotta full body contact, and impression of), etc, etc. from there it just keeps going down hill in the ratings (more Adult themed). There's also a rating system on video games as well, but I doubt that one would apply to Imagery here. Most likely, softporn is considered pg-17 (no one under 17) and if its litaure you usually have to be 18 in the U.S. to purchase it. I'm still not sure how the whole litature bit works, I have some comic books that only 18yr olds can buy but I couldn't figure out what made them different from the other comic books, The story line is a bit more complex, a couple cuss words here and there, but that was about it. I do have to admit though, alot of how other countries rate there material tward the children is alot different. even the canadian Rating sytem is alot different.