This song is a humorous and somewhat ungracious ode to Queen Elizabeth II, written by Paul McCartney as a joke. He described it as almost like a love song to the Queen, despite its mildly disrespectful tone, which he considered very tongue-in-cheek. The lyrics portray a man infatuated with Her Majesty but also having reservations about her, noting she's a "pretty nice girl" but "doesn't have a lot to say" and "changes from day to day." It's a playful, solo acoustic guitar piece from the album Abbey Road. Playing it, you can channel that lighthearted, slightly cheeky affection.