"Oh, well, I can't complain. Not when test subjects still give themselves so freely to me here."
His head tilts to the side.
"I was not aware that it was already October. Have I entirely lost track of time again? It would not surprise me in the least."
The Doctor twists off the jar, shaking the container for a second.
"By all means. Though, if I may ask, what are you intending to do with these anyhow?"
If you truly want to hurt someone, you take away the things they love the most. I am more than familiar with just how fond people tend to be of their pets, believe me.
Not long after he's asked, he produces an entire jar filled to the brim with various teeth he's plucked from survivors over the many trials he's gone through.