What had stuck in my mind when I'd read of his work some years back was his idea of "second order desires", wanting to have the desire for X even if you don't

What had stuck in my mind when I'd read of his work some years back was his idea of "second order desires", wanting to have the desire for X even if you don't have the desire for X (e.g. for healthy food), and how having these second order desires can be seen as a form of free will--without second order desires, you are simply driven by your first order desires (like an animal). Just googled it for a refresher and found this[1] comprehensive but readable explanation of the above idea. The obituary refers to it briefly as well. [1] https://philosophy.tamucc.edu/notes/frankfurts-theory https://philosophy.tamucc.edu/notes/frankfurts-theory