Apprentice Miss Luciana: I work as an apprentice and always have my Birkenstock slippers on in the office. The dirt from the office sticks under the soles and the insoles have black marks from my feet, or from foot sweat and the dirt under my feet for months. I will make myself comfortable now and I let the foot slave lick my slippers. He should clean my Birkenstock sandals and start cleaning the soles with his tongue. Then he can lick my insoles clean, the dirt and sweat from my feet. Would you lick my shoes clean too?