https://www.4chan.org/rules#wg>Rules>Image Boards>/wg/ - Wallpapers/General>1: Wallpapers may depict anything within reason. Artistic nudes are allowed, but please do not post hardcore or other pornographic content.>2: Image quality is a must. A minimum resolution of 480x600 pixels is enforced on this board.
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And for those on here with barely a couple of braincells to rub together who need it explained in a bit more detail, an image like >>7728108
fits the definition of 'artistic nude' and thus is acceptable, while anything where the model is touching/playing with themself and/or the camera focus is specifically on the genitalia (e.g. >>7727446
) then the image is 'porn' rather than artistic nudity and so breaks rule 1 above.
Really though it's not fucking rocket science, there are dedicated boards for all manner of porn on this site, so if you wanna pretend to be all edgy and woke by posting gay hardcore porn on 4chan, maybe go post it on the appropriate board and leave this general wallpaper board for more artistic content.