Cleaning my dirty riding boots on his body and tongue

Description: My riding boots got really dirty - and i'm going to use this human doormat to clean them on. i start by trampling all over his naked chest, walk back and forth over his head and also stand on his head a couple of times - but of course, this only gets off some of the dirt! for my boots to get completely clean again, i'll need the slave's tongue! i order him to stick out his tongue while i'm still standing on his body and then wipe my dirty boot soles over his tongue - and stuff the tip of my boot into his mouth. do you think my boots will be completely clean when i'm done with this slave?!