Philosophy in the Bedroom (La Philosophie dans le boudoir) is a 1795 erotic book by the Marquis de Sade written in the form of a dramatic dialogue. Though initially considered a work of pornography, the book has come to be considered a socio-political drama. Set in a bedroom, the two lead characters make the argument that the only moral system that reinforces the recent political revolution is libertinism, and that if the people of France fail to adopt the libertine philosophy, France will be destined to return to a monarchic state.

Oh, that, in between sodomy and farting in to each other's mouths that is. A delightful mix of political discourse and rampant perversion as only the Marquis de Sade could write.