Tumblr目前的成人内容限制：

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...are now allowed...
Nudity and other kinds of adult material are generally welcome....

描绘露骨性行为的图影和图影创作不行，裸体图和小黄文是可以的。
Tumblr在2019年被Automattic公司收购，Automattic是wordpress的主要维护方之一，目前是WordPress.com和Gravatar等等网站的所有者。