Answer:
What can burn the eyes, sting the mouth, yet be consumed?
What can run but canβt walk?
I have rivers without water. Forests without trees. Mountains without rocks. Towns without houses.
My second is performed by my first, and it is thought a thief by the marks of my whole might be caught.
What has a single eye but cannot see?
You use it between your head and your toes, the more it works the thinner it grows.