A Limerick (Poetry! By Moi?!?!?!?)

Here's a limerick I wrote several years back when I learned a bit about the formal structure of one, and how the first, second, and last lines (the A's in the A-A-B-B-A rhyming pattern) had three beats, and that the third and fourth lines had two beats (I've bolded the beats below):

Two “threes”, two “twos”, and a “three”
This sounds like a lim’rick to me!

I can’t write this rot,
a poet I’m not!

That’s something that I’ll ne’er be!

Need I say that the last line says it all?