So let's say you're single and alone like Shadowheart. You're walking down the street and Margot Robbie jumps out of a limo and gives you the most unoriginal compliment "You're beautiful." Are you really going to just say "I know" ?
I'd tell the person that they are creepy and that I am going to leave now. Good if you can walk away from this and aren't waiting for the bus or worse still are stuck in one. What you are describing is an extremely uncomfortable situation.
But a BG3 date isn't some college party hookup - it's about choosing your closest and most trusted companion. In this context "You're beautiful" isn't just a compliment - it's an intention.
Act 1 romance can literally be a party hook-up, tiefling-party-hook-up. (The other one too, I guess) Some companions are more serious and cautious about it than others but it is a flirting stage. I have read someone boast that they started a fling with everyone in act 1 - though I am not quite sure I believe that and how it is supposed to work. But it's not any kind of deep bond yet. Depending on the companion you are starting to date it's either pure sex, friends with benefits, a nice bonding moment that can remain friendly (I am very fond of talking the night away with Shadowheart as friends, and the magic lesson is always a delight) or a tentative first acknowledging of interest.
And if you like Minthara, knock her out and date her later ....
