The new boots protected her knees from the concrete basement floor, but since they were expensive he put down some cardboard to keep them from getting scuffed. She knew that she was worth less than the boots and the fact that he took more care with them than her proved it. It turned her on to realize that she was just a set of holes to destroy and fuck, that her knees getting scraped up on the concrete floor meant nothing, but that the boots she was wearing had to be protected. She was so glad he decided to be her master.