Many mouth compilations focus on "Tingle-inducing" sounds. The crisp audio of whispering, clicking, or chewing triggers Autonomous Sensory Meridian Response (ASMR) in many viewers, providing a sense of relaxation and "brain tingles."
To stay in the "trending" feed, title your compilations with neutral language: "Oddly Satisfying Mouth Textures" rather than anything suggestive.
You cannot shoot this on a standard iPhone 8. Because the focal point is a 3-inch area of the face, you need: