[/quote]In a banter with Lae'zel he admits he needed someone he could trust. He also heavily hints that he turned Tav because he was scared of being betrayed and left by them.[/quote]
There is also a banter between Astarion and Minthara where he says that he wants to share immortality only with the person that he loves:
Minthata: "Would you ever consider sharing the gift of immortality with me, Astarion?"
Astarion: (chuckle)"I think not. Thats for me and my darling to share"
Minthara: "If they have kept your eyes and fangs from wandering to other necks, it must be a very special bond indeed"
This is another proof that the authors are contradicting themselves.
