Answer:
Sometimes I annoy you, sometimes you can't live without me. But no matter how hard you try, you can't destroy me. What am I?
What is the saddest fruit?
Brown I am and much admired; many horses have I tried; tire a horse and worry a man; tell me this riddle if you can.
I produce wool and spit a lot
Why did the computer keep sneezing?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.