The big tongue is a Rolling Stones thing and was used inside the fold of their Sticky Fingers album (the outer cover for which was an Andy Warhol photograph that seems primarily focused on a gentleman's sausage and/or the tight pants that constrain it; a working zipper was an included part of this published work).

Pink Floyd's popular Dark Side of the Moon artwork, meanwhile, involves an illustration of a prism splitting a beam of white light into a rainbow.