Blankety Blank

With sonnets, and when asked for one that's blank,
I often find the road to be uphill.
I rhyme, and you can take that to the river,
if rivers where a place to take assertions.

See what I mean? It clearly doesn't work.
Absurdity, hilarity ensue,
and that will tend to make me feel a jackass,
but not a jerk for fear that I get served.

So hopeless is the task, this lame endeavor,
that this example surely can instruct,
the odds of that occurring low, how could they
be anything but low, this stanza failed.

In short, excuse this miserable flop.
and don't you let me win, or my mike falter.