Answer:
The buyer doesn’t want it, the producer doesn’t need it and the user doesn’t know their using it.
There is one in every corner and two in every room.
What gets bigger the more you take away from it?
I'm a long curved fruit that grows in clusters and has soft pulpy flesh and yellow skin when ripe.
Even if you throw it away, it still comes back.
What never gets any wetter no matter how hard it rains?