This is the response I received from deviantart (Patreon)

Thank you for contacting DeviantArt.DeviantArt does support the submission of nude, erotic, sexually themed and even fetish based materials however our policies and practices related to this sexually themed content are designed to meet the expectations of the very large and diverse audience served by DeviantArt.We attempt to draw a line between an aspiration towards open artistic expression in all its forms and the recognition that many people may not wish to be exposed to overly explicit graphic or literary depictions of sexual activity while on DeviantArt.Your deviations were reviewed by our Moderation Staff and were determined to be violating our policies, specifically our Terms of Service (section 19 (b)), our Submission Agreement (section 7 (f)) and our Etiquette Policy Because the content was sexually explicitin a manner not permitted on DeviantArt it was removed.These rules also apply to any content uploaded to stash lo assist you in understanding the restrictions governing sexually themed material we would recommend that you refer to our knowledge base article located here