Sir Paul McCartney has confessed that he never paid attention in music class.The former Beatle and music legend admits that he was too busy smoking and playing card games to learn anything.Sir Paul told The Sunday Times newspaper: "At school, in terms of musical education, I got zero. We'd all go into the classroom and the teacher would put on a record, then he'd leave the room."So of course we took it off, posted a guard on the door, got the ciggies and the cards out, and when he came back, we put the record back on for the last couple of bars."He'd go 'What did you think of that?' And we were like, 'Oh, really good, sir. Fabulous'."