When his show came to Cincinnati in 1990, the art director was arrested and the Contemporary Arts Center, the museum that brought his exhibit to town, was criminally charged with obscenity for exhibiting sadomasochistic photographs. The museum director received many letters requesting he step down from his position, which they kept all of these years and put on display last year in the reunion exhibit.
> No museum or director has ever been charged since.
http://www.cincinnati.com/story/news/2015/03/28/pornography-...
(This article is SFW.)
I'll bet a lot of those letters aren't safe for work!
I do have a Robert Mappelthorpe t-shirt that is safe-for-work, if a imposing (it's a tightly-cropped self-portrait of eyes), but unfortunately most people don't get why it's funny to wear to work :(
So, sure, "not safe for work"... :-)