Answer:
My teeth help me suck.
Everyone asks for me but yet everyone hates to face me. For someone I am agony, for others I am relief! What am I?
There are four of us but it seems like everyone loves spades the most.
I jump when I walk and sit when I stand. What am I?
What body part is pronounced as one letter, but written with three, only two different letters are used?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.