Well you see the thing to understand is poetry is a gospel to the world.
At first you feel as if it is oppressive chains tying you down to the soiled earth with every simplistic tick tock.
That is at least until you discover this world has no rules for an adventurer of free verse.
Your words now flow like an expeditious brook as long as you use metaphors with pretentious words.  

However rules exist it is plain to see.
Some poems go aabb.
Those are simple ones to find.
Those are the ones stuck in your mind.

Now one more step, aabbc.
Those are a little more artsy.
You draw your crowd in.
Get under their skin,
And finish a little bit different.

And now it's time for set number three.
One that can simply astound.
The great, magnificent abab.
Those make a poet nearly profound.

There are  couplets, sonnets, and monoryhms.
And now for the last one, all in good time.
I wanted you all to hear them like chimes,
But all that I had I left you in these lines.