/lit/ - Literature

Which philosophers argue against homosexuality from a secular/a-religious point of view? It seems to be a thing that is commonly accepted in our culture almost across the board, and yet whenever I see two gays engaging in romantic/sexual activity I feel a great sense of repulsion and disgust to my core, like I’m witnessing something depraved and unnatural. When I argued with my gay coworker about it today he asked me to give him an actual argument as to why it’s bad, but I couldn’t say anything beyond “it disgusts me” which he said carried no weight because it’s just a feeling. It seems like barely anybody else shares the same feeling as I, so I’m looking for some actual philosophical arguments against homosexuality.