Like if we used unique non-fake nude photos of celebrities as currency, well they'd be worth something.
The value of which would entirely depend on a particular person's sexual utility curve. Inherent value is subjective. A currency needs to have good transactional properties, and needs to be a fully transparent system that can't be manipulated. It does *not* have to have underlying "worth" or what have you. There is no underlying worth that has the same value to everyone, for one thing, and for another, it's highly unlikely that such a thing would have good transactional properties which are vastly more important for something functioning as money.
I think most of us on this board agree that fiat currencies are bad, but that's because the quantity can obviously be changed at will by a few powerful people, not because dollar bills aren't made out of food. You're confusing stable transactional utility with consumption utility.