Answer:
If you have it, you don’t share it. If you share it, you don’t have it. What is it?
I am used for light yet I am solid. Without me you would feel enclosed. I hate being touched especially with a lot of force. I like to be in buildings.
I climb higher as I get hotter. I can never escape from my crystal cage.
I go up and I go down, towards the sky and the ground. I’m present and past tense too, let’s go for a ride, me and you. What am I?
I go inside boots and outside shoes. What am I?
I flow from the Homer’s mouth when he sees doughnuts.