Why does smoking make me stutter and gets blocks more often

Why does smoking make me stutter and gets blocks more often Basically I rarely smoke and whenever i do my speech become dogshit around my friends who I’ve been talk fluently before. I’m 18M now, and back when I was 17, I would smoke occasionally. It never really made me feel ‘high’; I mostly just went along with it because my friends were doing it. My best guess is that maybe, deep down, it never felt right to me that i was disappointing my parents idkkkk……