Why?

I am a professor of profanity
A doctor of banality
No master of subtlety
Which is such a tragedy
Despite the incongruity
I am not the Lord Almighty
Most agree with this, very happily
But I am sad about that actually
Agreed, I am too sleazy
Make most people feel queasy
But when it comes to poetry
I find it just comes naturally
To me, at least, it comes easily
Especially when every line ends with a Y.