 A second widespread (though less unified) institutional approach to marriage appeals to the ideal marital love relationship to define the structure of marriage. This approach, in the work of different philosophers, yields a variety of specific prescriptions, on, for example, whether marital love (or committed romantic love in general) requires sexual difference or sexual exclusivity (Scruton 1986, 305–311, Chapter 11, Halwani 2003, 226–242, Chartier 2016). Some, but not all, proponents explicitly argue that the marital love relationship is an objective good (Scruton 1986, Chapter 11, 356–361, Martin 1993). These views, however, all take the essential feature, and purpose, of marriage to be protecting a sexual love relationship. The thought is that marriage helps to maintain and support a relationship either in itself valuable, or at least valued by the parties to it.