Lyric discussion by maniacafrodisiac 

Every time I listen to it.. it makes me think that the mouth he's talking about isn't on her face, if you catch my drift. He's too lazy to go down on her, and he's 'already gone'. "Hey you know me, and I know you." And then he calls her a 'slag' which is apparently british slang for a slut.

It could be all a big dirty joke, or a commentary on the whole male chauvinist / selfish asshole manly douche thing, or he really just hates going down on women/her.. and if he's already gotten his fill then she's a 'slag' for asking for it. It's like.. 'Oh c'mon baby, your pussy is a mile away, don't be such a slut.' And then 'Hey, you know me', as if that validates his attitude, 'and I know you', (you're a slag, lol) more excuses.

If there's anything to interpret from the tone of the song, it's that he's pretty angry.. but that sense of humor is always hiding in the shadows somewhere. Honestly, I'm glad that the intent of it (and so many other Pixies songs) is left a mystery. Ambiguity is what allows insanely awesome songs like this mean so many things to so many people. =)

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