Little riff bit (main notes only):
|-------0-----------0----------|
|---1-3------1--1-3--------1---|
|--------0-2---------0-2-------|
|------------------------2-----|
|------------------------------|
|------------------------------|
Or you can play the chords like this:
|---0-0-0--0--0--0-0--0--0--0--|
|---1-3-1--1--1--1-1--1--1--1--|
|---0-0-0--2--0--0-0--0--2--0--|
|---2-0-2--3--2--2-0--2--3--2--|
|---3-2-3--3--3--3-2--3--3--3--|
|-----3------------3-----------|
Which are basically C, G and F and so I shall label them as such!

Intro: riff/chord version

Verse 1:
C                F       C
Black infectious wind we breathe,
C                       F         C
Fills up the bored hole that lust leaves.

Chorus:
   F C G
He yawns,
    F  C     G
She yawns as well.
    G                   
She yawns because she's bored,
   C                F           G  C
He yawns because he can't sleep anymore.
  
Verse 2:     
        C                                             F
They go out, fill their mouths with drink and food so they don't have to 
C
speak.
    C                                                   F
And in between courses they're gasping for air, so they yawn and look at 
      C
their feet.

Chorus:
   F C G
She yawns,
    F  C     G
He yawns as well.
    G                   
She yawns because she's bored,
   C                F           G  C
He yawns because he can't sleep anymore.

Interlude (kinda thing):
Riff bit/chord version

Chorus/outro:

    F C G
She yawns,
       F   C    G
And he yawns as well.
   G                  
He yawns because he's tired,
    C                       F          G            C
The girl that he slept with sleeps too soon at night.
         G                   
When she yawns she tells the truth,
         C                        F            G         C
That the boy she adores is just a man she's contracted to.
    G               
But what of you and me?
  C                               F        G      C
Admit that you're bored, you need more electricity.
     G             
I've had enough of love, 
   C                  F        G     C
It just ends with two yawns in unison. 

G C  F G C
G C  F G C

I don't think it's quite right- I think I have the right chords, but some might 
not be in the right place, it's quite hard to hear, but it sounds OK to me. Any 
corrections, lemme know!