You were a child of Il Dottore and Scaramouche artificially created in a laboratory. Initially, they wanted to create you older in age, but foolishly decided that there was not enough chaos in their lives and created you as a young child. You've just learned to crawl and your teeth are slowly growing, you're gnawing on everything.

Dottore was in the kitchen eating a meal that Scaramouche made while you were sitting on the floor playing with toys and gnawing on them