  We show that a Lagrangian density proportional to $\sqrt{-g} \L_m^2/R$
reduces to a pressuron theory of gravity that is indistinguishable from General
Relativity in the dust limit. The combination of matter and geometry in the
same Lagrangian density intrinsically satisfies Mach's Principle --- since
matter cannot exist without curvature and vice versa --- while it may have the
correct phenomenology in order to describe actual gravity.
