Answer:
What has a head and a tail, but no body or legs?
My second is performed by my first. A thief by the marks of my whole might be caught. What am I?
My teeth help me suck.
I can go through glass without breaking it. What am I?
Everyone asks for me but yet everyone hates to face me. For someone I am agony for others I am relief. Who am I?
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.