Gabriel de Cool had a heck of a name, and he seems to have been principally a painter of nudes. This muse is certainly not the Muse of History, Dance, or of Epic Poetry. This muse looks more like the muse of absinthe, hashish, Symbolist Poetry, and kinky sex. The image is obviously kitsch, but it is the very successful, totally corrupting, kind of kitsch that makes you want to look again, and enjoy doing it.
Hat tip to Madame Scherzo.