You’ve never got it down. It’s this fluid thing, music. I kind of like that. I wouldn’t like to be blasé or think, ‘Oh you know I know how to do this.’ In fact I teach a class at a the Liverpool Institute High School for Boys — I do a little songwriting class with the students — and nearly always the first thing I go in and say [is], 'I don’t know how to do this. You would think I do, but it’s not one of these things you ever know how to do.