“a couple to sing a favourite childhood television theme tune could bond them together,”
Yeah, that’s something we do together all the time.
That specific example is silly, but I do think there's something to it. My wife and I (2 year age difference) have had his conversation and discussed that because of the proximity of our ages there are cultural, historic and generational references we can make in the course of our casual conversations that make it easier to communicate.
Writer of this piece seems to be about 12 years old emotionally and in possession of the composition skills of a 7-year-old.