We do not allow the submission of "Adult" or pornographic materials to DeviantArt under any circumstances. These restrictions apply to active and stored DeviantArt submissions, sta.sh submissions, PCP files, etc. Such material will be removed immediately as it comes to our attention.
Staff may also, depending on the purpose, take action against links which lead to pornographic content or other materials which violate the DeviantArt terms of service.
The official definition of what is considered pornographic material is detailed elsewhere in the FAQ.