The slave has to carry me on his back - I don't want to get the whole floor dirty with my muddy boots ;-) Then he has to lie down on the floor so I can use his weak body as a doormat - he's just a pathetic living rug I can use and I rub my muddy boots all over his white shirt, his face and even his groin and legs. After a while his shirt is so dirty - my boots won't get cleaner trampling on it - so he has to take it off and I continue to trample his bare chest. Afterwards, when most of the dirt is stomped out he will have to clean them with his tongue!