IX. Vocal vibrations
A part of Remi's scalp may be like the neck of a steel or slide guitar. Or the keys of a piano or harmonium. Ola may play these keys or frets with the chopping surface of their right hand, bent at a right angle at the knuckles. So Remi would feel a straight or shallow arched pinky finger, squarely connected to Ola's palm. Ola pressing on one of these keys would make Remi bite Ola's flesh and hum so Remi's vocal vibrations would travel through their teeth to Ola's flesh. "Tuning" in this process may involve Ola biting Remi's body near their neck, collar, or shoulder, and humming a certain frequency into Remi's body, referring to the pressure of a certain key pressed on Remi's scalp.
II. Tongue location and pressure
III. Lip location and mouth pressure
IV. Outside and penetrating fingers