The long and the short of it....(Paradox poem)

This poem is so clever...can anybody figure it out? i understood the first 4 paragraghs but trying to understand the last 2 gets very confusing even after reading the explanation. But i love it anyway.

Why is it that long is shorter than short,
And short is longer than long?
Why is long not longer than short
And short not shorter than long?

Why is not shorter shorter than short,
As longer is longer than long?
And why is longer shorter than shorter
And shorter not shorter than long?

If shorter was short and short was shorter,
Then shorter'd be shorter than short.
But if long were longer and longer were long
Then longer'd be shorter than long.

I hereby suggest that shorter be long
And longer be shorter instead.
Then long would be longer
'Thus longer than short
And short could be just as it was.

But if longer is shorter, is shorter longer,
And shorter not long as I said?
And if long is now longer and shorter now long,
Is short still as short as it was?

Can longer be shorter, whilst shorter is long,
Or is shorter now longer not long?
And if long is now longer and shorter is long,
Is long not shorter as well?


Explanation in the website http://www.curiouser.co.uk/paradoxes/word.htm