So first of, I'm French, and its a pretty harsh language, so there is a lot of words to stutter on unfortunately. I manage to get more fluent by adding filling words : "Today I went to the park with my dog" into "Well Today I, like went to the park with my dog" Adding "Well", or "So basically dadada.." is something that helps me whenever I get the feeling I'm about to block on a word. Now about fapping. Not masturbating will make you as a man more assertive, more proud, more hungry for success in a way. You'll start to want to talk more, to talk louder when you do talk, express your opinion on useless bs... No fapping makes you basically more assertive and dominant and therefore you will think less about your stutter, won't be that afraid to talk in public, to ask people questions, to introduce yourself etc. Ofc its not magical. I do enjoy pron and quitting is fking terrible lol (yeah 19 I don't have no girls). And also you will still stutter occasionnally, but the biggest difference is that you won't care at all about it. And by not caring, you won't start to sweat, or make weird faces, or start to apologising cringely. So yeah, it won't go away magically but it makes a huge difference, especially in the long run...