Answer:
I reach for the sky, but clutch to the ground. Sometimes I leave, but I am always around. What am I?
I am not a toy though many use me for pleasure. I have a butt but I cannot poo.
In my life I must bare, my bloodline I must share. What am I?
The more you have me, the less you see. Shine a light on me and I flee. What am I?
I am a cold man without a soul. If there is warmth in me, it slowly will kill me. What am I?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.