Librarians in shoes, shoes that look like they belong to a librarian, shoes in libraries. If you can reasonably describe your photo with a single sentence that contains the words "librarian" and "shoes," then put it here.
Please, no pornography. You know, the "know-it-when-you-see-it" kind. I'm sure there's a "Nekkid librarians in shoes" group--put those there. :)