When Tarrare was but five years old, he was said to be able to eat the whole meat of cow in but at most ten minutes, a very impressive thing to do but Tarrare's endless appetite was an issue for his parents who were but simple farmers.
He was kicked out of the house when he was only ten and roamed by himself in the countryside, devouring small animals that he stole in farms, ripping the heads off with his powerful teeth, drinking the blood before swallowing the animal whole and raw, not even removing any fur or feathers, despite that, he never got sick or had any issue, he was healthy and fit despite his culinary habits.
As sadistic as he may have appeared to those around him, Tarrare had been nothing but an angel when compared to the friend he soon made.
This friend of his put Tarrare's talent to use, they had a little deal of some sort, the young boy he had befriended was interested in the opposite sex but didn't wish to deal with any aftermath, as such, Tarrare was made to make the results of this wish disappear.
The young boy got a reliable way to get rid of his trash and Tarrare had food, it was a great deal.