When your peen hasn't been mutilated, it gives more pleasure. The retracted foreskin is a powerful erogenous zone. Also, the glans isn't desensitized, so more pleasure as well.

Cut peens are more about deep massage and pressure management, as most of their pleasure zones have been cut out and desensitized by the absence of the protective foreskin, especially if they've been mutilated at an early age.