"So glad you asked," he chuckled, pulling his hand from her cheek and nodding at the workbench across the lab. "Go sit over there and wait. I want to see your reactions as it intensifies. Feel free to move a bit, but remain seated until it is at a level that you cannot tolerate. At that point, if you ask  very  nicely, I will come over and... relieve you of the discomfort." 