Fly weight

And in this corner:

A man that wants to go out fighting,
And hopes it's fighting an inanimate object.

(I think I know that won't work...)

I need something that can absorb all the shame of every fist I throw. Something that doesn't understand the frustration of being only strong enough to stand up. Something that isn't a man's son, or a mother's daughter. Something that can't hurt.
I have to do this,
so I can say that I would never hurt a fly.