Adam gulped.
What he heard sounded more like monster behavior, though... Adam didn't see monsters eating their kin of the same species. Even for monsters, cannibalism at this level was not common.
In fact, cannibalism was condemned by all of society for a very simple reason - it was most often murder and there were always ways to find food.
If there was no one else in the world except humans, and there were no fruits, vegetables, cereals, or any other source of food except the flesh of another human being, there would be no such term as cannibalism at all, because there would be no other way to find food.
But, this was a theoretical situation in an impossible world, humans and all other living creatures needed something to eat to grow muscles, which in fact was meat.