Answer:
If you have me you want to share me. Once you share me you wonβt have me.
What is black when you buy it, red when you use it, and gray when you throw it away?
I always have to work with something in my eye. What am I?
I always have to work with something in my eye.
I'm a kind of cup that doesn't hold water, but makes a lot of noise repeatedly. What am I?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.