Answer:
Crooked as a rainbow, and slick as a plate, Ten thousand horses can't pull it straight.
Not a burden for its weight and daily carried out, He who takes it wishes it had never come about
In the forest, this blends in just right, but every December it is covered with lights. What is it?
You can see nothing else, When you look in my face, I will look you in the eye, And I will never lie.
As a whole, I am both safe and secure. Behead me, I become a place of meeting. Behead me again, I am the partner of ready. Restore me, I become the domain of beasts.
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.