I really think that's an "attitude" that you're projecting onto those lyrics - which you are perfectly entitled to do, of course, but it's unfair to attribute the attitude to the lyrics themselves. There are many possible situations these lyrics might suggest, which is probably part of their appeal. Why, for instance, assume that Peggy Gordon hardly knows the speaker? Perhaps they have been involved in a lengthy conjugal relationship, one feature of which has been her propensity to sit on his knee and update him on the state of their affairs ....