Answer:
I saw a strange creature. Long, hard, and straight, thrusting into a round, dark opening. Preparing to discharge its load of lives. Puffing and squealing noises accompanied it, then a final screech as it slowed and stopped.
There are several different kinds, but the one you pick doesn't do its job. What is it?
At first, I am nothing. Add something to negate. Add again to oppose. Add again to find the time to draw. Add once more to find nobody at all.
All about, but cannot be seen, Can be captured, cannot be held, No throat, but can be heard.
The sun bakes them, the hand breaks them, the foot treads on them, and the mouth tastes them.
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.