One of the greatest, neverending need for almost all
creatures, is the need for food. Unfortunately, carrying
a slain corpse around is not a very tasteful or easy 
way to keep food at hand. Anyone who needs to survive
for a while and provide a practical source of food for
himself, learns to skin the corpses and refine the flesh
and store it in containers, where it is much better 
enjoyed, especially in the future. The more skillful
one is at the art of tinning, the better the quality
of the food he can store. Also, proficiency is needed
in order to not break a tinning kit.