Emotional bonds tie everyone together. To not have any emotional ties is to not be human. It is unavoidable. And because of these bonds, even for the strongest of Sith, if a bond is discovered, it can be manipulated. This is a weakness.
What a Sith has to be able to do, is hide these attachments. Learn the art of deception, and anything can be yours. Misleading, misguiding, rumor, and lies are all tools to deceive those you might harm you. Once these concepts are mastered, an individual can keep attachments, with little fear of exploitation by outside forces. But there is an inherit weakness that still exists, and even the most masterful Sith cannot hide all bonds from everyone. People are more intelligent that they are given credit for. For every person that may not notice a glace, a phrasing, the way you are holding yourself, one will.
Body language, and the way to hide it, as well as note it in others, may very well be a note I shall post here in the future.
"She shields him, protects him. I will destroy everything she loves, all that she holds dear. I will cast his corpse at her feet; it will be as if killing her children." - Darth Sion
