In the scene Deanna asks Tasha this question as if it were of the utmost importance, but it had no bearing whatsoever on the situation they were in. Tasha's life was in danger (remember, she had just been challenged to a duel to the death). She was also a prisoner against her will, and millions of people were at risk if vaccines were not obtained. If you remember the scene, it wasn't a question asked to lighten the situation, it was asked in the middle of a serious conversation, as if the guy's hotness was an important fact.
But as I said, in that particular context, it was completely irrelevant. What would have changed in practice if she had found him attractive or not? Even if, ironically, she had been madly in love with him and decided to stay there forever, it was something to be resolved after the fight, when more pressing issues had been resolved.
And again, it was a deeply offensive question in that context. Tasha was a prisoner, in a political machination where her life was at risk. But let's say that, by some odd chance, due to some unresolved trauma, Tasha, in some recesses of her subconscious, found some aspects of the kidnapping intriguing:
1) It's obvious that Tasha rationally understood how wrong the situation was and what was at stake.
2) Troi starts to discuss Tasha's fetishes right there, in that context in front of the captain?!?
It implicates that the female security chief who spent her childhood running from "rape gangs" secretly enjoys being kidnapped.