Prickling at the Concha, Pressure at the Lobe: Participants' Own Words for the Threshold Sensation in an Archive of 1,148 Transcutaneous Auricular Stimulation Sessions, and What They Give Away About the Sham Resolving to Prickling at the Concha, Pressure at the Lobe: Participants' Own Words for the Threshold Sensation in an Archive of 1,148 Transcutaneous Auricular Stimulation Sessions, and What They Give Away About the Sham…