As others have stated, I assume all companions talk around the campfire at night. Also, I have played dozens of campaigns (324 hrs played) and most followed one of the good paths and I can always count on Astarian hitting on me so they are not mutually exclusive.
Gale is always hitting on me too. Even playing evil, I have only romanced Shadowheart and Lae'zel by
cheesing them with the dog or the well.
