The BDSM gag is not a modern invention. It is a living echo of the oldest method of human control — the removal of speech. Across history, those in power have understood the primal effect of silencing the voice. The mouth is where freedom hides. The tongue speaks rebellion. The lips tell stories that can disrupt, escape, or manipulate. The moment a Dominant chooses to close that mouth, they are reaching across millennia to assert ancient rule.