I found this article interesting. John Kayser took thousands of erotic images of women and his work was only discovered recently, after his death. What drew my attention was one paragraph which describes a photo where the model was sitting on a cream pie. Unfortunately, no images appear to be available at the moment:


http://observer.com/2016/05/how-a-photographers-secret-obsession-with-smut-wound-up-in-the-gallery-world/

Here it is:

I have this book: http://www.ampersandgallerypdx.com/books/sitting-john-k-text-by-eric-kroll-1
I bought it for this image in particular - (which is clearly the best ) - but all the photographs are very good, & pretty interesting.

This one isn't in the book, but it's from the same photographer.
She appears to be sitting in a plate of some kind of mushy food.