The dirt on Mistress Jane's muddy leather boots dissolves so much better with spit, so she spits on them before making the slave lick them clean. Just to be sure, she spits on the them again. After all, all the dirt has to be properly licked away and the spit along with it. She watches the slave very closely to check his work because she wants her boots perfectly clean so she can go out in them at any time. But wait... what is this? There is still dirt on them! Mistress Jane spits on them again. Lick it ALL off, slave!