My Enormous 5-letter Word Which Starts with a "P" and ends with an "ENIS"

Check out this song! Watch the video first, skip all the way to the 1st minute because it's just talking, and then enjoy. Play it a second time, and sing along!

Whenever life gets you down,
keeps you wearing a frown,
and the gravy train has left you behind...
and when you're all out of hope,
down at the end of your rope,
and nobody's there to throw you a line...
If you ever get so low
that you don't know which way to go
come on and take a walk in my shoes...
Never worry 'bout a thing
got the world on a string
Cause I've got the cure for all of my blues.

I take a look at my enormous penis
and my troubles start melting away.
I take a look at my enormous penis
and the happy times are coming to stay.

I gotta sing and I dance
when I glance in my pants
and the feeling's like a sunshiney day...
I take a look at my enormous penis
and everything is going my way.

I take a look at my enormous penis
and my troubles start melting away.
I take a look at my enormous penis
and the happy times are coming to stay.

Yeah I got great big amounts
in the place where it counts
and the feeling's like a sunshiney day...
I take a look at my enormous penis
and everything is going my way.

Everything is going my way...
Everything is going my way...
Everything is going my way...

Must...resist...urge...to make...jokes...must...not...be...a.......dick. GAH.