Answer:
If you have me you want to share me. If you share me you don't have me. What am I?
I am a shimmering field that reaches far. Yet I have no tracks and am crossed without paths.
My first is in window but not in pane. My second's in road but not in lane. My third is in oval but not in round. My fourth is in hearing but not in sound. My whole is known as a sign of peace. And from noah's ark won quick release.
I run around the streets all day. Under the bed or by the door I sit at night, never alone. My tongue hangs out, waiting to be fed during the day. What am I?
A young man wants to have me but when he has me, he no longer wants me. What am I?
No matter how little or how much you use me, you change me every month.