Answer:
What five-letter word becomes shorter when you add two letters to it?
What does an envelope say when you lick it?
What can your pocket hold while it is completely empty?
If I say "everything I tell you is a lie", am I telling you the truth or a lie?
A ham Sandwich walks into a bar and orders a beer, and the bartender says?
You throw me out when you use me and take me in when you are done.