That is a dark way of looking at it -- I was much less queerly offended, though honestly the thing that struck me more than Quark's "Changeling Pride" line was Sisko's "it's okay behind closed doors, just not on the Promenade" speech. Which is less dark, but, you know, there's still a lot of don't ask/don't tell about that episode. What's important, of course, is that Kira accepted Odo's gayness, and more than that was willing to do whatever it took to love the man whatever shape he might choose to take.

(Though I have to agree with londonkds that it is highly dubious that Kira's never seen/played with Odo in anything other than humanoid form. I mean, the very MOMENT they first chose to have sex you'd think they'd immediately start exploring, especially considering Odo's had much more experience with Ma Changeling than he ever had with the bedroom-eyes girl, AND I think it's wildly out of character to think that Kira wouldn't want Odo to be himself around her. Dax's comments about Kira's xenophobia re: Capt. Boday's transparent skull excepted.)

I was also noting how unique Odo and Kira are as far as interspecies alien TV sex. I mean, sure, we've had Klingon/Human and Vulcan/Human and vague energy being/Human, but Kira and Odo had a real opportunity to explore the problems inherent with sex and intimacy between two totally different species. Sadly, Chimera's really the only episode that handles it at all -- too bad TPTB dropped the ball on that one. Fortunately there was a lot of good fanfic to make up for it back in the day.