Okay, The riff is the same throughout- 
and I'll include the bass part for convenience...

1------------I-----------I------------I Repeat.
2------------I-----------I------------I
3-5-5--5-5-5-I-3-3--3-3-3I------------I
4------------I-----------I-1-1--1-1-1-I
______

And here's the guitar riff, that comes in in the chorus- 
as Black Francis screams: "TAME!!!"
1------------I------------I----------------I Repeat.
2------------I------------I----------------I
3-7-7--7-7-7-I-5-5--5-5-5-I-10-10-10-10-10-I
4-7-7--7-7-7-I-5-5--5-5-5-I-10-10-10-10-10-I
5-5-5--5-5-5-I-3-3--3-3-3-I-8--8--8--8--8--I
6------------I------------I----------------I 

and here's what Joey plays:
1-13^-(13)-15^-I Just do that with lots of  
2--------------I distortion, and repeat 
3--------------I throughout the chorus.
4--------------I  Play about with trills
5--------------I using those two notes.   
6--------------I
  The lyrics are really simple- you should be able to work 
them out by listening hard. But there's one line which I 
thought ended with 'Shag' at first- it is infact 'Must be 
havin' a good shame.'

  Just so you know.

  After the second chorus, there's that great bit with 
Black Francis and Kim Deal going: "Uh-huh", with that it's 
the same as the verse: Bass only. 

  Have fun, it's simple, enjoyable to play and a great song. 
Play along to the CD to work out the timing of the singing.