There has been a major revival of interest in contract theory since the early 1970s that shows no immediate sign of abating. New, sophisticated innovation of the idea of social contract are accompanied by some highly technical and, in many cases, very elegant developments of contract argument, some of which are presented by Marxists, once firm opponents of the theoretical assumptions and practical implications of contract doctrine. My reason for adding a very different contribution to the literature is that something vital is missing from the current discussion. The sexual contract is a repressed dimension of the contract theory, an integral part of the rational choice of the familiar, original agreement.