This is a coincidence I was having this very same conversation with my son who unfortunately has this on a 60's compilation CD. I wonder what was inside his head when he wrote it! I know Rita Heyworth had something going with the Aga Khan but I don't recall her sounding like Marlena Dietrich and I am sure she didn't come from Naples. Surely Peter Sarstedt's big brother Eden Cane would have been more likely the age to fancy Sophia Loren. Perhaps she turned one of them down and it was a bit of sour grapes, a little bit like You're so Vain by Carly Simon