Venn Diagram

I have lost you to sleep again Sleeping as we do on opposite sides of a venn diagram I read the time in shadows on your wall The shards of light through the slats on your window I ease myself from under your languid arm I fumble on my boots and hear you breathe through your alarm And I disarm it for you, you rarely heed it anyway I wouldn't want it to intrude upon your dream School bell ring, messing up the play A note, penned clumsily in this century's type-ruined hand Saying "Gone down the shops for a walk I'll bring back some sandwiches" And then I kiss your face, the black and the blue I tie it into my laces, I don't want the wander blocking up the view I stumble out into the afternoon I'm still salty from drink and the late night pool And I'll be gone an hour at most, you will be more diagonal And I've a head on me in the post, I know, a castle swallowed in the swell