"Sure." Xavier said, letting himself relax into the chair. It went down and it gave him a better opportunity to study Brian's face. There was nowhere else to look while getting worked on. The pain in his mouth was ignored well enough; he'd had some training int and hiding that. The mask did well to hide whatever it was Brian had covered up - almost too well. If tools weren't in his mouth, Xavier would have frowned over it.
When he prodded that area, he managed a wince - letting control of his usual composure for once. "Just a bit," he said around the tool. His grimace became overempasized. "What's that mean?"