Answer:
If two is company and three is a crowd, what is four and five?
I may be of the eye, in order I am pie. In my center there is a star, I keep medics where they are. What am I?
Of these things - I have two. One for me - and one for you. And when you ask about the price I simply smile and nod twice.
I am a portal to another world which you cannot enter. Only you can see me but I can't see you.
You use a knife to slice my head but you weep beside me when I am dead
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.