Put that puny, pathetic penis through some trauma!
Let's face it: the only reason that thing between your slave's legs exists is for your amusement, and the best way to enjoy it is to listen to all the funny noises from your plaything as you make it suffer! This cruel chastity device will make your sub whimper as soon as they see it. A small cock cage made out of hex nuts attaches to one of the base rings, small or large depending on your bitch's size and comfort tolerance. Lock them up and throw away the key (or at least hide it so that they're at your mercy). Now comes the really fun part! Ten sharp little screws can be placed in any of the hex nuts to tighten or loosen, depending on how evil you're feeling. Teasingly prick the delicate flesh of that useless skintag or drive the spikes deep in for the ultimate torment. Your CBT slut will never forget who owns them once they've been fully destroyed, mind and body, by your sadism.