Answer:
What can you share and still have all for yourself?
Kills the bad ones and the sad ones. Tightens to fit, so one size fits.
I can be used to type and point you see. But don't forget, you can count on me. What am I?
Ripped from my mother's womb. Beaten and burned, I become a blood thirsty killer.
My first is nothing but a nameอพ my second is more smallอพ my whole is of so little fame it has no name at all.
People take me on walks and I run and have fun. What am I?