STAR TREK: DEEP SPACE NINE // S6E19 In the Pale Moonlight
My father used to say that the road to Hell is paved with good intentions. I laid the first stone right there. I'd committed myself. I'd pay any price; go to any lengths because my cause was righteous. My… intentions were good. In the beginning, that seemed like enough.
I watched "Through the Looking Glass" (DS9, S3E19) where prime!Sisko and mirror!Dax make out and before that - "Fascination" (S3E10, the episode Lwaxana Troi infected everyone with her horniness) where prime Sisko and Dax are getting it on again. It is not even implied, it's explicitly stated that they have the hots for each other.
But Dax, Curzon Dax, is like a father figure for Sisko? Kind of problematic, no? It seems impossible to determine their age difference in canon, but when Curzon the host died, he was an old man, and Sisko was 35. And they were friends for a long ass time, but most importantly Curzon was his mentor. Did Sisko always have a crush on Curzon, despite their not really equal relationship? It's entirely possible, actually.
And now just imagine the feels, just appreciate the emotional struggle Sisko is going through. There is this moment in "Through the Looking Glass" where Jadzia jumps him passionately, and Sisko just aquiesces and goes on with it because he can't blow his cover, but he feels that it's wrong? Let's see the script for the scene real quick.
DAX: I really am glad you're alive.
She walks over to him and begins unbuttoning his shirt.
DAX: And I'm going to make you glad you're alive, too.
He grabs her wrists as if to stop her.
Dax looks at him like he's insane. DAX: It can wait.
Sisko realizes he's in danger of blowing his cover. There's no way out of this; he has to play his part. He lets go of her wrists.
SISKO: I suppose it can at that.
And as she smiles and presses up against him...
So, let's just take a moment to appreciate the emotional turmoil that Sisko is facing in that episode. He is obviously attracted to Jadzia herself, and on top of that he has feelings for Curzon Dax, whatever they may be (we can only guess from his interaction with Curzodo), and Sisko really -- really thinks that it's not okay to act on those feelings, but he has no alternative in the mirror universe.
And right after having sex with his former mentor, he has to woo Major Kira (a woman who regards him as a god, btw), as well.
I bet Sisko had quite a traumatic experience in the mirror universe he'll have to spend quite some time unpacking.
Garak agrees. (But I still think that he finds the Sisko/Kira make out session quite hot, how am I supposed to interpret this expression otherwise?)