 Other philosophers of gay and lesbian oppression have responded in defense of same-sex marriage that it not only serves gay liberation, it is essential to it. Excluding gays and lesbians from marriage marks them as inferior, and so same-sex marriage would decrease stigmas against homosexuality. Further, the costs of same-sex marriage must be weighed with benefits such as healthcare, custody and inheritance rights, and tax and immigration status (Calhoun 2000, Chapter 5, Ferguson 2007, Mayo and Gunderson 2000). Finally, in response to worries about gay and lesbian assimilation, defenders of same-sex marriage have argued that marriage can incorporate diversity, rather than suppressing it. Marriage need not entail monogamy; indeed, it is argued that same-sex marriage could perform the liberatory function of teaching heterosexuals that neither gender roles nor monogamy are essential to love and marriage (Mohr 2005, 69–9, cf. Halwani 2003, Chapter 3; but see Brake 2018 for discussion of whether “subversive weddings” can transform social attitudes if they are not recognized as initiating marriages).