Sankaku Channel/

There will always be borderline cases and disagreements on the most appropriate rating for images regardless of how many categories there are. Bright lines of demarcation that everyone will agree with are impossible. Everyone has a different view on when an image crosses the line into questionable or pornographic. My view is that safe images should be images where there is wide agreement that the images are safe, explicit should be where there is wide agreement that the images are pornographic, and questionable should be where there is some disagreement on if it is pornographic or not. based on the discussion it seem that exposed nipples and nudity without a clear view of a vagina or penis falls into the third category and is most appropriately labeled questionable.