I dont know if it's pains or not, but some days, especially after a session of watching porn, the back of my head (where the cerebellum locates) feels heavy, my jaw stuck and there are tics at the back of my head whenever I finish my sentences and when i turn my head round many times, something feels like breaking the connections of my brain synapses. When the symptoms appear, I know that I'll stutter more frequently next several days. Hope to hear your thought on this.