Answer:
The thinkers usually hold this body part
What starts with the letter T, is filled with T and ends in T?
I have joy in bringing two together, but darning my existence! My life hangs by a thread, filled with ups, downs and resistance!
I make billions of dollars selling Windows. Who am I?
The negative hero in each story
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.