Mistress Eva wanted this slave to learn about patience. She hated the fact that he was impatient and yet he was a slave. He had to learn to fit into his shoes. So the mistress tested his patience by humiliating him with her sneakers which he had to lick and making him wait while she chatted with her friends and did other things to delay him and what he was doing. He was pushed to the limit but he knew better than to do anything stupid.