Olivia Hussey.I know someone who deals in vintage Italian racecars. He opines that men are like baby birds - when the testosterone kicks in, they pattern-imprint on the desirable car / actress / Hi-Fi of the moment, and carry that as the platonic ideal for the rest of their life. (Greatest generation guys like blower Bentleys, baby boomers like GTOs and GT40s*; millennials like e30 M3s)
I saw Zeffirelli's Romeo & Juliet when I was 12 or so. Juliet, as played by Olivia Hussey, became the prototype for "attractive woman" (or, at the time for 12-year-old me, attractive girl). This has stuck with me for my entire life. My first girlfriend looked like her. My wife looks a bit like her. Blondes need not apply.
I think, for most things in life, there's an Olivia Hussey. Including stereos.