I am one of the thousands of otakus who cosplay and draw
So, I have a theory of why Princess Bubblegum is half candy half human. Everyone knows what happened to the Ice King, right? Well, this also takes place during that time period, before the Earth become the Land of Ooo. Bonnibel majored in multiple science fields, but she could never find a job involving those fields. So she worked at a candy factory. And one day, during inspections I guess, she fell in a batter of Bubblegum. I had told my friend nolifeinc about this, and she said she preferred this then the actual theory.