What is allowed here? Right now we don't know, but are checking with Wikia.
We do know what Wikia does not want this to be. According to Wikia staff member Sannse:
"Overall, you will need to avoid graphic photographs or images and keep the context of the wikia to an educational, medical, or sociological context. If it becomes an erotic resource, with explicit text and images, it won't be suitable for Wikia." We haven't yet learned what "graphic photographs or images" means, except that images showing explicit sexual intercourse are not allowed. Other than that, we'll have to wait and see.