Weird Censorship due to "User Guidelines"

Weird Censorship: I provided the prompt "spinning plates inundated by work", and got a monkey telling me "Uh oh, One or more words may not meet User Guidelines and were removed."  I edited the prompt to "use the idea of spinning plates to express the idea of being inundated by work", and the same problem.  Needless to say, the suggested images were not at all what I wanted. 

I don't know what bizarred "User Guideline" I contravened, and clicking the "Learn More" button did nothing to enlighten me.