The flirt options are meant to show deliberate, personal, romantic interest in the other character. Are you really surprised that Dorian would respond to that? Or that your inquisitor would be genuinely into it if you chose that option?
Yes, I was surprised. There are flirt options for non-romance characters, like your scout Harding, that reports to you in the field. I always saw my flirting with her as the sort of flirting that happens between James Bond and Moneypenny. Nothing serious, just having fun. Otherwise, my heart would be aching for every single person I've flirted with in the game. Even with the romance characters, the flirt lines are pretty innocuous.
Not saying I wanted a prompt that said "This will make you kiss him," but a little heads up would have been nice, like when it gives you the heads up that you're about to start a romance, or that you're about to deny someone joining your inner circle. Which is why I was all the more surprised when it actually did give me the prompt. I was kind of like, "That would have been useful about five minutes ago..."
I think part of the problem with portraying realistic people, relationships, and sexualities is, well... I don't want to come off as rude because you have valid points, and I understand where you're coming from but...
...
In a video game (and in RPGs especially) there are limits to how you can respond to a situation or conversation. If you're picking the heart-flirt options consistently for a character, in a Bioware game that means you are pursuing that character romantically. At least with Bioware nowadays. I prefer this, because how you respond to someone will actually have some discernable and predictable effect. Both Kotor and Jade Empire could trigger romantic subplots without the player really meaning to, and the Baldur's Gate series seems almost more trouble than its worth to try to pursue a romance with a companion.
About Harding, yeah, I kind of figured that it was that kind of flirting. I think I saw some other flirts that happened with other non-romance NPCs, and figured that it could be the case here, but perhaps that was a poor assumption on my part.
Regarding the video-gameness, that's fair. There is a limit to what you can convey with a conversation wheel.
But yes, I think the lack of a prompt probably threw me a bit, because there was a prompt / warning for almost everything else in Inquisition, when there hadn't been before in previous games.
Also, I loved the romances in Baldur's Gate. Oh, the love triangles... xD That is, when they didn't bug out and just not happen any more.
-S