so this is complicated. when you abstain from masturbation, you are eliminating escapist behaviors. people masturbate to run away from uncomfortable feelings. they also masturbate to reason with our incalculably powerful sex drive. when you choose to not escape, you will be forced to deal with all sorts of emotions. depending on your level of consciousness you will handle it accordingly. stuttering is related to self worth, fear, shame, etc. by not masturbating you are confronting the pain associated with stuttering. this is something you will need to do with a therapist. if you are able to process these emotions and use them for deeper awareness and growth - it will allow you to greater surrender to and accept your stutter. so in fact yes, nofap will ultimately help you untangle the pain and feelings of worthlessness that are attached to stuttering.