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We show that the hydrodynamic lubrication of contacting conformal surfaceswith a typical texture height gives rise to a universal behaviour in theStribeck curve in which the friction coefficient shows an anomalous power-lawdependence on the Sommerfeld number, $\mu \sim S^{2/3}$. When the gap heightdrops below the `texture length scale', deviations from $S^{2/3}$ occur, whichmay resemble the onset of elasto-hydrodynamic and mixed lubrication. Withinthis framework, we analyse literature data for oral processing and find$S^{2/3}$ scaling with deviations consistent with measured lengthscales.

Gap-Dependent Hydrodynamic Lubrication in Conformal Contacts