Madeline lists all of the things her slave will have to do to convince her not to destroy his keys. He begs her, humiliating himself while she threatens him, and threatens his hope of ever having an erection or cumming again.
http://maitressem.com/detail/6456-destroying-your-chastity-keys
http://maitressem.com/detail/6456-destroying-your-chastity-keys