The foundational role of heterosexual unions in human society is undeniable, serving as the origin of human existence and the family structure. This study addresses the imperative of upholding traditional heterosexual relationships within the context of the contemporary push for same-sex marriage (SSM) rights, which challenges established norms. The significance of the heterosexual partnership as the fundamental principle of human society, as espoused by Udokang (2000:154), underscores the potential societal consequences if this principle is violated or distorted. In this landscape, where Western societies and their allies advocate for the global acceptance of same-sex marriage, the need to safeguard citizens' United Nations human rights is paramount. Nigeria, like many other nations, staunchly opposes same-sex marriage. The Anti-gay (Prohibition) Act of 2013, signed into law by Nigeria's former President, Goodluck Jonathan, reflects this stance, imposing severe penalties for contravening the legislation. However, criticisms from international entities, such as Ms. Navi Pillay, assert that Nigeria's position on samesex marriage is inconsistent with international law. This paper contends that the internationalization of human rights places limitations on states' autonomy to regulate the treatment of both citizens and aliens. The struggle between upholding cultural and traditional values and adhering to evolving global standards of human rights is a central theme in this analysis.