Answer:
u always follow me but I am rarely seen
I am a house with two occupants sometimes one rarely three. Break the walls eat the boarders then throw away me.
Whoever made me doesn't want me. Whoever bought me doesn't need me. Whoever uses me doesn't know me. What am I?
What has many teeth but can't bite?
I ask no questions but receive a lot of answers
Give it food and it will live, give it water and it will die.