Immanuel Kant offers definitions of “sexual desire” and “sexual use” in the Metaphysics of Morals that occasion an inconsistency within his moral system, for they entail that sexual desire, as a natural inclination that is conditionally good, is also categorically objectifying, and thus per se immoral according to the second formulation of the Categorical Imperative. Following Alan Soble, various attempts to resolve the inconsistency are here criticized before more suitable, and suitably Kantian, definitions of these terms are offered. It is (...) argued that these new definitions resolve the inconsistency. (shrink)