Aside from his constant humiliation, the other thing Dava and Ela extract from this slave is his money. He may now live at the end of their leash but he is still expected to pay them regularly, to fund their lifestyle in any way their whims see fit. As you can imagine much of that results in money for new shoes, since the girls expect their feet to be wrapped in new footwear as often as possible at his expense.

Aside from his constant humiliation, the other thing Dava and Ela extract from this slave is his money. He may now live at the end of their leash but he is still expected to pay them regularly, to fund their lifestyle in any way their whims see fit. As you can imagine much of that results in money for new shoes, since the girls expect their feet to be wrapped in new footwear as often as possible at his expense.