Most of my CBT instructions require me to trust you to apply my style of sensual sadism at home. Today�s assignment makes sure that you will. I�m going to guide you through the devilish device known as the Zipper, a series of clothespins that are applied to your tender areas and then removed in a specific way. I�ll give you accompanying masturbation instructions and we�ll see if you can manage an orgasm by the end. Fair warning.. this is not for the CBT novice.