Answer:
If you have me you want to share me. If you share me you don't have me. What am I?
I have two eyes in the front and a lot of eyes on my tail
What runs but never walks has a mouth but never talks has a head but never weeps has a bed but never sleeps?
I am rubber you can eat!
The more you have me the less you see. Shine a light on me and I shall flee.
Boxers do this for a living and kids do it in the backseat for free