Ipod on random “and your bird can sing” came on. You can tell the musicians enjoyed making the guitar line circular, making it more complex than the usual smaller length of a pop hook, making it have unexpected continuity. According to my expert use of a thing called google – Lennon later dismissed his writing as hollow. I think it means that he wasn’t writing about real events but as an exercise. Just my guess because as he aged he became more identified with lyrics reflecting real events externally or internally and not for the sake of the business of being a songwriter. Whatever the real story it is absolutely true McCartney’s bass line is gorgeous. Strange to me that as his life proceeded I never hear McCartney making as many bass statements. I wish he would join a band and just be a side musician on bass.