Not all CBT needs to be extreme or incredibly painful – that Naturally will depend on the tolerance and desires of the male slave and Mistress.
There are instances of gentle penis bondage that can be extremely erotic and add immeasurably to both the Mistress’ and man slave’s pleasure. Today this mistress is gently binding her slave’s penis so that when he becomes erect it will be mildly constricted. Nothing in CBT needs to be extreme unless both the femdom and the slave desire it and it can all be highly erotic.
You can see more gentle penis bondage by clicking here.