My songs are my diary, and the love songs are a great part of the emotional journal...not long ago we made a tally of categories of my songs. It was pretty loose, you know, agit prop, humour, social commentary etc..., but there was a surprise in it. 39% of the songs involved love in one form or another. Actually I was amazed. 
Of the individuals referred to within (or by) the songs Harper stated,
Two of the women are Swedish, one of the men has left the planet and the other is related. Now there's some arcane trivia.