Answer:
How can a pants pocket be empty and still have something in it?
They can be long or short; they can be grown or bought; they can be painted or left bare; they can be round or square.
Barren location, infertile and dry; my name means "to leave", it's not heard to see why
What has a head yet it never weeps, has a bed but never sleeps, can run but can not walks, and has a bank but not a cent to its name?
What can be measured but has no length, width or height?
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?