Homer's Seeing-Eye Dog

Most of the time he worked, a sort of sleep
with a purpose, so far as I could tell.
How he got from the dark of sleep
to the dark of waking up I'll never know;
the lax sprawl sleep allowed him
began to set from the edges in,
like a custard, and then he was awake,
me too, of course, wriggling my ears
while he unlocked his bladder and stream
of dopey wake-up jokes. The one
about the wine-dark pee I hated instantly.
I stood at the ready, like a god
in an epic, but there was never much
to do. Oh now and then I'd make a sure
intervention, save a life, whatever.
But my exploits don't interest you
and of his life all I can say is that
when he'd poured out his work
the best of it was gone and then he died.
He was a great man and I loved him.
Not a whimper about his sex life --
how I detest your prurience --
but here's a farewell literary tip:
I myself am the model for Penelope.
Don't snicker, you hairless moron,
I know so well what faithful means
there's not even a word for it in Dog,
I just embody it. I think you bipeds
have a catchphrase for it: "To thine own self
be true, . . ." though like a blind man's shadow,
the second half is only there for those who know
it's missing. Merely a dog, I'll tell you
what it is: " . . . as if you had a choice."