 The song 's lyrics underwent many changes , in order to find the right level of vulgarity . The initial version was much more “ genteel , ” while later versions included references to ‘ turtleheads ’ and other slang for feces ; as was the line “ It may sound gross , it may sound crass , but we need to see what comes out of your ass ” ; which was changed to “ It may sound gross , you may say shush , but we need to see what comes out of your tush . ” 
