I think I mentioned this in the other incest thread that was going on but I'll reiterate it here again because I think it's important: even if there is no physical harm by two consenting siblings or other relatives, it CAN do emotional harm. This type of attraction is not healthy. Attachment between family members limits your abilities to form healthy relationships with other people.
Plus, I just learned that the female serial killer, Aileen Wuornos (of Monster fame played by Charlize Theron) had incestual relationships with her brother from early childhood-teenage years. Just saying.
