Briefly explain the main points of the essays by Gallagher and Koppelman, as well as the arguments by Levin and Corvino, which address same-sex relationships. Explain the authors’ different points of view on the ethics of same-sex relationships.

Briefly explain the main points of the essays by Gallagher and Koppelman, as well as the arguments by Levin and Corvino, which address same-sex relationships. Explain the authors’ different points of view on the ethics of same-sex relationships.