This is one of my favourites from Spike Milligan, its called Me.

Born screaming small into this world-
Living I am.
Occupational therapy twixt birth and death-
What was I before?
What will I be next?
What am I now?
Cruel answer carried in the jesting mind
of a careless God
I will not bend and grovel
When I die. If he says my sins are myriad
And he will say 'My chisels were blunt'
I will say 'Then why did you make so
many of me'