Answer:
Passed from father to son and shared between brothers, its importance is unquestioned though it is used more by others.
You can draw me, fire me or fill me in.
You fill it and it empties, A metaphor for plenty, Depending on what half you see, It's either full or empty
Women don't have and don't want it. Men get it but sometimes they try to get rid of it. What is it?
Consuming food would be pretty tough without these chompers
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?