Often, when the 'natural' is invoked, we are left in the dark as to whether it is meant as an explanation, a recommendation, a claim for determinism, or simply a desperate appeal, as if the 'natural' were some sort of metaphysical glue that could hold our claims or values together.
Immovable Laws, Irresistible Rights: Natural Law, Moral Rights, and Feminist Ethics (2000 edition)