This is really primitive compared to how Patrick Stump probably plays it, but it 
gets the point across. The chords are mainly G#, A#, and Cm throughout with an Fm 
in there, and I play the Cm on the eighth fret instead of the third because it 
sounds better that way.

Intro x2:
e ------------------------|
B ------------------------|
G ------------------------|
D -------------------1----|
A --3-1-3-----1-2-3-------|
E 4-------3-1-------------|

G#, A#, Cm x2
 
[Verse 1]
G#
Whenever you find it 
A#              Cm
It?s none of my business
G#
Now wherever you go, go, go
A#                 Cm
It?s not my concern
          G#                         A#            Cm
But for a second your attention just belonged to me
       G#                                          A#        Cm
And it passed so fast it just fractured all my cool

[Pre-Chorus 1]
A#
I?m not broken hearted
Fm                    G#
I?m just kinda pissed off

[Chorus 1]
       G#             A#        Cm
?Cause Allie I was so good back then
      G#                            A#           
But I wonder if I?d be so good if I saw you again
Cm                  G#
Listen miss, you?ve got me
                             A#             Cm
You should?ve taught me such naughty things 
                                G#
(you should have taught me such naughty things)
                               A#          Cm
Oh you could?ve taught me such naughty things

G#, A#, Cm

[Verse 2]
                G#       N/C
Oh, you sang to me (in a whisper, a capella)
      A#                 Cm
Cross-legged on Andrew?s bed
               G#      
And I, drunk beyond my fifteen years
                      A#          Cm
Wished to be anywhere else instead
                      G#
?Cause I was too terrified of you
                            A#        Cm
And all I was too scared to dare to do
                 G# 
So I slid on the spot off the mattress
                    A#
And crumpled to the floor
                 Cm
And the sad fact is

[Pre-Chorus 2]
             A#
You said you were protected
Fm                            G#
I thought you meant you had a gun

[Chorus 2]
G#             A#        Cm
Allie I was so good back then
      G#                            A#           
But I wonder if I?d be so good if I saw you again
Cm                  G#
Listen miss, you?ve got me
                             A#             Cm
You should?ve taught me such naughty things 
                                G#
(you should have taught me such naughty things)
                               A#          Cm
Oh you could?ve taught me such naughty things

Intro x2:
e ------------------------|
B ------------------------|
G ------------------------|
D -------------------1----|
A --3-1-3-----1-2-3-------|
E 4-------3-1-------------|

Play G#, A#, Cm x2 through solo

G#

[Chorus 3]
N/C   G#             A#      Cm
(Huh) Allie I was so good? 
G#                                A#
But I wonder, but I wonder, but I wonder 
      Cm                  G#
But I wonder if I?d be so good 
                                       A#
(Allie, you should have taught me such naughty things)
    Cm                         G#
You should have taught me such naughty things
                                A#         Cm
Oh, you could?ve taught me such naughty things

[Chorus 4]
G#             A#        Cm
Allie I was so good back then
      G#                            A#   
But I wonder if I?d be so good if I saw you again
Cm                  G#
Listen miss, you?ve got me
                             A#    
You should?ve taught me such naughty things
   Cm                      G#
(Tonight we're going to do naughty things)
                                  A#         Cm
Oh, you could have taught me such naughty things? yeah

G#, A#, Cm