I don't think of same-sex couples as fundamentally different from opposite-sex couples, minus the reproduction aspect. If I were a guy and with my partner as a guy, I can't see our relationship being any different from how it is now. Maybe we'd have sex a different way, but the basis of our relationship would be the same in terms of friendship, companionship, intimacy, teamwork, etc.

The reproduction aspect is perhaps being made as more important than it really is by virtue of this being a heteronormative world that encourages a viewpoint of heterosexual supremacy. The idea that as animals, reproduction is somehow more important than friendship, companionship, intimacy, teamwork, etc. seems to make the most sense when looking at things clinically. I like the way you're seeing and interpreting this, though.

I'm sure I'm not a typical example, but I don't believe there is any gendered aspect to my relationship with my partner. In my eyes, our dynamic is irrelevant to our respective biological sexes.

That's a very interesting way of looking at your relationship. You're not discounting the attraction to the person based on sex, but you're giving the overall humanity precedence, and I quite like that. I would hope it were a more typical example than not, that seems quite healthy and something admirable to strive for.