This is the exact verbiage from the community guidelines:
Sexually Explicit Material. Visual depictions of sexually explicit acts (or content with an overt focus on genitalia) are not allowed on Tumblr. That includes pictures, videos, GIFs, drawings, CGI, or anything similar. Historically significant art that you may find in a mainstream museum and which depicts sex acts—such as from India’s Śuṅga Empire—are now allowed on Tumblr with proper labeling.
Nudity and other kinds of adult material are generally welcome. We’re not here to judge your art, we just ask that you add a Community Label to your mature content so that people can choose to filter it out of their Dashboard if they prefer.
You have the option to add a community label when making a new post, reblogging a post, or editing an existing post. Depending on your content, you can label it as generally mature or choose a specific category such as “Sexual Themes” if your post contains sexually suggestive subject matter.
Blogs which have a focus on mature content may not be eligible for certain Tumblr features, including monetization options. We need to consider the policies of our partners in the payments space, so the rules there are a bit different.
For more information about this guideline, and how to appeal decisions about sexually explicit material, check out our Help Center article.
Policy is what is said, and that’s often a huge gap between what actually happens.
Tumblr had a huge content moderation issue where (based on my personal experience) I’m guessing there are incentives in place around flagging explicit content. I’ve never posted or reblogged anything that would break this policy, but every single post I make on my main blog is automatically flagged as explicit/adult content (eg a photo of my cat) and going though a content appeal I’d say 50% the human-reviewed content appeal fails and my post gets hidden.
I ended up creating a separate blog that I now post content to, and then reblog to my main account.
It’s impossible to get a hold of any support to try and resolve.
Despite non-existent support and increasingly buggy apps, it’s still the best online community I’ve found and I love it :)
We'll try to get better about support, bugginess, and account switching should be a lot nicer so you can actually use Tumblr as different personas when you want to.
