Answer:
If you lose one of me, you are upset, bewildered, and perplexed. If you lose two of me, you are blissfully unaware. What am I?
You used to come to me for all sorts of information and knowledge before the internet was born
Without me everyone would lose their head. What am I?
What has 13 hearts but no other organs?
The more you add the less it weighs. What is it?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.