One way is to do it the way you were planning. How about a bunch of religious folks with anuses for heads? The other way is to replace the obvious items with other metaphors. If people are on the right wavelength, they will know what you are saying. If you are a perv, you will know what this picture is about. This is an example of using objects to represent other objects. If you are not a perv, you will not see it. http://www.renderosity.com/viewed.ez?galleryid=462467&Start=1&Artist=SevenOfEleven&ByArtist=Yes