Answer:
What is easy to get into, and hard to get out of?
Which fish costs the most?
It increases and decreases yet no one see it. It is not a fire and yet it can be quenched.
Some are clean and some are dirty, but all are meant to get a chuckle. Most like it, some takes offense from it.
What can never be eaten at Thanksgiving dinner?
What did the piece of wood say when he saw the screwdriver and screws approaching?