Would you be surprised if I told you that I don't need you to agree with how I feel and that I don't see any value in convincing or compelling you to believe what I do? I'm arguing with you because I find homosexuality fascinating, and because there is no better way to truly understand someone's perspective than asking them questions to learn how they will respond. I don't expect you to to try to change my mind, and nor do I expect you to try to change your own mind. It's pretty clear to me that's not what you've been trying to do.
People do seek pleasure, especially me. That's not surprising or inherently bad. But there's usually a reason things are pleasurable. The things people enjoy usually have deeper value to them. My approach may be simple-minded, but so is my goal. I just want to understand you better. Is the reason you are gay (or bi) because you don't believe there is a deeper meaning to the things that humans find pleasurable?