…Huh? Astarion will potentially sleep with Lae’zel at the Tiefling party. If that’s not proof enough of his canon interest in women, I don’t know what would be. He also flirts with both Lae’zel and Shadowheart multiple times in party banter.
I don’t understand being so hung up on the men he mentions in his past when he only mentions two out of one thousand people. Not exactly a great sample size. He also wasn’t in love with them. He had compassion for them, but that’s not the same thing as love. Tbh no matter what his sexuality is I would assume that most of his victims would be men anyway. It’s a lot easier to convince a man to go home with a total stranger than it is to convince a woman to do the same.