"Aggression is about dominance. A person is aggressive when they impose their will onto another person and force them to submit, in effect invading that person's personal space and boundary. Violence may be used in this effort, but it is not a necessary component of aggression. Passivity, on the other hand is about submission. Passivity occurs when a person submits to another person's dominance play, putting their own wishes and desires aside so as to pay attention to fulfilling the wishes and desires of their dominant partner. They may not like being dominated (most people don't), but it seems like the smart thing to do at the time (perhaps to avoid the threat of violence or other coercion). Aggression is about domination and invasion; it is fundamentally disrespectful of relationship partner's personal boundaries. Passivity is about submission and being invaded; it is fundamentally disrespectful of one's own personal boundaries."
Interesting.