I've just got home from the yard and my riding boots are absolutely filthy! Why would I waste my time cleaning them myself, when I can just use your tongue? Look at all the massive chunks of mud on my boots, they are caked and you're going to have to scrape it all off, just with your teeth. It's going to taste vile but you have no choice. You're my boot cleaning bitch and while you're down there, clean all of the dirt your Mistress has got all over the floor too! You'd better make sure you do a good job, or I'll make you clean something a lot worse off the soles of my boots next time.