Never let it be said that the Doctor didn't want challenges. To him, he enjoyed proving he was capable of doing things others thought was impossible.
"No," he smiled thinly. "No cages, no shackles, no shock therapy." It was a poor taste joke, but he went with it anyway. "In fact, I do try to make all my procedures as painless as possible."
All said with a somewhat straight face, though there was a touch of laughter in his eyes.