Why all the major 7ths?

I did a lot of jazz charts in high school. I'd usually turn a tonic chord into a 6th or 7th. Turned a lot of dominant chords into 13ths. For some reason, I'm really keen on major 7ths and 9ths. - Though I don't compose them in the way a classical composer would, I think that my albums tend to have motivic and thematic development. That's why Paul and I spent a huge amount of time debating the order of the tracks. Much like with The Perfumed Garden, it took a collaboration to find the right order. A few other people chimed in, like Dave Grohl and Ringo, but it was mostly Paul and I. I wrote the songs, but Paul produced the recordings and told me to add bits etc. - James and Mary saw early cuts: Paul told me afterwards he was doing it for his whānau.