Using his face and tongue to clean my boots

Description: I've locked the slave in the facetrampling box - since i want to use his face and tongue to clean my terribly dirty buffalo boots! these shoes are so dirty - they leave behind imprints on the box and his face right away ... they definitely need a thorough cleaning! i'm also stepping onto his white shirt in between a couple of times, before i get to trampling his face. i order him to stick out his tongue and brutally wipe my dirty boot soles over it - and of course, he has to swallow all of this disgusting dirt! after a couple of minutes his whole face is covered in dirt and his tongue is black from licking all of the mud ... but my boots are still not clean again ... so we've to continue this for a while!