E5            Ab5
Whenever life gets you down
             A5       A5
Keeps you wearing a frown
          B5     Bb5       A5       Ab5  E5
And the gravy train has left you behind
               E5          Ab5
And when your all out of hope
             A5           A5
Down at the end of your rope
       F#5                          B5
And nobody's there to throw you a line

        A5
If you ever get so low
                A5
That you don't know which way to go
     E5                         E5
Come on and take a walk in my shoes
       F#5
Never worry 'bout a thing
 F#5  Ab5   A5
Got the world on a string
            B5                          
Cause I've got the cure for all of my blues (all of his blues)

                 E5          Ab5  C#5
I take a look at my enormous penis
          A5               B5       E5   E5   Eb5   E5
And my troubles start a-meltin' away (ba-doom bop)
                 E5          Ab5  C#5
I take a look at my enormous penis
          F#5                       B5
And the happy times are comin' to stay (be-doo)

         A5
I got a sing and I dance
         A5
When I glance in my pants
        E5                        Eb5  C#5
And a-feelin's like a sun shiny daaaaay
                 A5          B5  E5   Eb5 D5  C#5
I take a look at my enormous  Pee--e--e--nis
          A5          B5        E5   E5   Eb5   E5
And a-everything is goin' my way (ba-doom bop)


And that's basically it. The rest of the song uses 
the same chords. Just listen to it and you should 
figure out the structure.